As far as anyone knows, the drop rate is random. But when an event is random, then there's no reason for drops to be equally spaced. In fact, it's perfectly reasonable for someone to get two lockboxes in a row.

In other words, the drop rate is only a set rate on average. Each trial is completely independent of every other event.

I got two lockboxes today as well, same run, depth 22 and depth 27 in Jade Gate. Never touched a Silver key.

Also got one last night on a shadow snarby run. (And if it interests you to know I paid all 1800 energy for the shadow key)

Nah I doubt thats how it works, drop rate is random.

...only mostly random.
I seem to remember someone did some research, and found out this:
- those who open lockboxes have a higher chance of receiving them
- those who sell off their lockboxes have a low chance of receiving them.

That doesn't mean it's impossible for you to get several lockboxes without opening one.
It's just that it's highly unlikely.

not saying it was aliens
but it was aliens

I bought 2 silver keys within the past 2 days. I never found iron lockboxes before. I found 2 iron lockboxes within 2 missions back to back.

First one opened contained cool glasses which look nice on my costume.

Second one opened contained prismatic glow eyes.

I don't care what marketting scheme this is, but I freaking love it?