"in-game advertisements during loading screens, as proposed by Tennispro in Sinxeno's discussion contest."
I don't think there's that much money to be made from advertisements. It might be interesting if they offered to let you turn ads at the loading screens off or on, and if you have them on, you can use elevators for 9 energy rather than 10, for example. I don't know if that would on net gain or lose them revenue.
"some out-of-game market as an alternate source of income, like plushies."
If there's money to be made doing that, then Three Rings would do that in addition to however they make money in-game, not instead of it.
"Sometimes I think Three Rings should make it so that you can't trade crowns for crystal energy at all. That would, of course, make a lot of players worse off and no one better off, so they shouldn't actually do that. But it would stop this whining from people who don't like the exchange rate."
Hahaha, I new you were trolling. 0/10, I'm out of this troll thread. Enjoy your unstable economy.
Edit: I just realized that Spiral Knights has over a million players. And you guise still think that a Mist Tank NPC will make Three Rings go bankrupt.