Stupid slots.

I know this has been brought up (many times) before...
But I would pay good money for permanent weapon/trinket slots. I have a good list of reasons why:
1.) I feel gimped without them.For this reason, I consider them almost mandatory.
2.) Hassle-free. Wouldn't have to worry about expiry or re-application.
3.) Flexibility. Sometimes I take breaks from the game. I don't like having to feel 'obligated' to play for a good chunk of 30 days so that my purchase is 'worth it'.
4.) Completion. My Knight would feel more complete if these upgrades were permanent.
5.) Trinkets are literally worthless without them. At least you can equip two weapons at base. Not so for trinkets, if you don't buy these slots... you don't get to use them period.
6.) They're basically a 'subscription.' I've been playing this game on and off for a long time, and I would like to be able to just come back whenever without being "taxed" to start playing again at my leisure.
I'm sure many of these points could be argued against, but, this is just my personal feelings on the matter.

I wouldn't mind real money. In fact I would kind of expect them to be sold for real money.

I think a big part of the psychology of games like this is habit: The developers want you playing every day, so that it's a regular part of your life.
If that's true, then any new feature that encourages you to take (or removes a penalty for taking) long breaks is counter to their interests.
Disclaimer: I'm not saying how things should be. I'm speculating about why they are as they are.
Also, you might want to try playing without weapon and trinket slots. Constraining yourself sometimes leads to unexpected challenge and enjoyment.

Actually lately I've been foregoing the weapon slots (they're more expensive) and it's not awful... definitely reduces the flexibility of your arsenal, though. I can't seem to give up trinkets though, it really bugs me that you'd have to give up such powerful bonuses (and also not be able to use an entire classification of equip -at all-)

i would like to buy permanet slots, but then naysayers will say "No because its a TUUUPID idea and OOO will not make money" but then we going to say "but they can make money giving us Forge passes like we used to have elevator passes!" but then they going to say "NOO BECAUSE ITS A TUUPID IDEA THIS WILL MAKE THE GAME PAY TO WIN WE DONT WANT THAT SO NO".
in the end this going to end like a forgotten thread like many threads just because OOO HOLY INQUISITION dont want people to pay for things like permant slots or forge pass that yeah sure will make people go fasters but hey they pay for it, OOO get moneys (and more) to improve the game they love whats bad with that? BUT NO, they want us to pay for gamblinng boxes with bad chances because they would even pay 15 bucks for confetti.
pretty sad but oh well thats how is.

Hope is right.
I have seen this Suggestion many times Before, and the Same answer Is "NO THEN IT WOULD B PAY 2 WIN LELELELEL" every single Time.
I have even made a suggestion for that as well and everybody hated it.

More than anything, as outlined above, I just want the freedom to pick and choose when I play without being penalized for it. Just like Bopp said above, perhaps the main reason is an attempt at player retention by perceived value lost if you don't make adequate use of something you spent money on within the set time constraints...
I wish that OOO would realize that players could be kept longer (and happier) by simply spicing up the game every once in a while with more events and additional content. But, I get it... those things take time and money to develop (though speaking from the perspective of one who's played this game on and off for about 3 years... they've had plenty of time >_>)

Honestly I think extended slots (more expensive, but last much longer) or a specialized "timed slot" upgrade would both be worthwhile.
A timed slot would be something that would only tick down when your player is online. They would obviously last shorter than a 30 day slot if you're playing much more (say, they're a 24-hour timed slot for 100 energy (trinket), or 24-hour timed slot for 200 energy (weapon)). Thus, if you play more than 24 hours monthly, it'll be better to just spend 50 energy extra to fill that slot.
If you got a monthly slot the timed slot would stop counting down until that time period is over.
Extended slots would be like, 90 day, 180 days, and 365 day slot upgrades. Have them be cheaper if you buy them up front (425ce for a 90 day trinket slot, 825ce for a 180 day trinket slot, 1600ce for a 365 day trinket slot).
Slots are a subscription model. However, in Spiral Knights, you're only given one method of payment. Typical subscription have a month, 3 month, 6 month, and yearly subscription options. Spiral Knights only has the month option, which can be expanded upon.
You can easily make 1600ce in a year's time. However it can be difficult to get your players playing the entirety of a year.

Such a baby, let me tell you I've fought Tortodrones (enough to get four 5star items ), crafted every single obsidian item, made it to the top of Mount Krampus multiple times, defeated Vanaduke and battled my way through every single new mission in the core update.
I've done all this Without using Trinkets or Weapon Slots!

^ umad?
I've never used trinket slots, except for the occaisional wyrmwood bracelet or the single Gun DMG Bonus trinket that I own, and that was only because it was a bound trinket slot.
A single weapon slot allows you to have 3 weapons (one of each damage type, or one of each weapon category if you're a balanced hybrid) and only sets you back. That's 700 crowns per day, which is half a level.
The only time you should feel gimped when not using trinket slots is in LD because heart pendants are stupidly OP.

They're basically a 'subscription.
Is that a problem? Personally I would prefer that 000 had a premium membership than rely on box promotions. If part of that membership meant free slot boosters every month in addition to whatever goodies it came with, that would be optimal in my opinion.

Actually, it is a problem.
Extra Credits - Doing Free to Play Wrong
Selling power directly should be avoided at all costs when it comes to the monetization of free to play games. The supply depot has many, many examples of selling power directly - but honestly most of the options available are so stupid expensive that it's not really worth talking about. (Sane people would not purchase weapons from there.)

Yes, generally, selling cosmetics is preferable to selling power. The problem is that when you sell too much cosmetics and you get to the point where a huge portion of your income comes from people who don't play the game but just merch or try to look pretty, development on actual content starts grinding to a crawl in favor of selling cosmetics.

Well honestly, the slots don't cost all that much at all, and are completely unnecessary for players. Slots are cheap for end-game players, which is where they're required moreso.
Slots themselves are done pretty fairly. You could run firestorm citadel 8 times in a month (not that hard to do, just twice a week if you play that much) and still come out with a profit, and have all slots unlocked. Or, if you like the challenge, you can save that 800 energy and just save up for a while.
Slots themselves are not a bad model, however we really ought to expand on the idea of slot unlocks.

I think that they could make considerably more by selling permanent slots than they do by selling temporary ones... and I think this because it's hard for many to wrap their head around the idea that they are not eternal.
The logic against permanent slots goes that if you buy slot tokens from now until infinity, Three Rings makes infinite moneys off of you, and receives a supposedly steady income in the process. This however is short sighted, because no one is going to play from now until infinity, and chances are the bulk of players are going to minmax their slots-- not playing heavily for a month becomes the same as not buying slots for a month, for many players at least. Rather than making 12 slots worth of profit, they might make 10, 8, far less depending on the player. On top of that is the fact that players see themselves as being elated for skipping out on weapon slots- you might beat the tortodrone, but I beat the tortodrone without a third weapon slot = I am the spiralest knightlier knight!
Permanent weapon slots would be like tricking the knight into buying 10, 15 even 30 years worth of slots all at once. Who in their right mind would buy 30 years worth of weapon slots all at once? Only people that are willing to show their commitment to the game, get that badge of honor, and feel complete.

Token-event boxes can give slot upgrades. That being said, theyre not very efficient to farm that way...

Permanent weapon slots would be like tricking the knight into buying 10, 15 even 30 years worth of slots all at once.
Except that if a permanent slot cost 1620000 CR or its CE equivalent most people would just not spend that much.
The difference is that on a per-month basis, the cost of a slot seems cheap, and that's good for 000 to get people convinced to sink CE into it.

Honestly they could probably sell perma slots for like 5~10 bucks each and people would buy them (I might if I'm feeling spendy) and, like every new promo that comes out, just not give the option for buying with CE so they're guaranteed income.
Hell they could even make it a time-limited thing that only pops up every once in a while to pressure people into making impulse buys.
That is pretty true. But i doubt OOO's will make this. If they were to, they should at least make it to where you must buy it with real money.... wait, too greedy?