I'm in other comments defending Steam/Valve, this is in no way meant to support Epic, but do you really think Steam isn't at the bleeding edge of in-game gambling? TF2 invented loot boxes, CSGO skins are an entire asset class at this point....I'm sure Deadlock will contain some sort of boxes...

Not to mention the absurd chance that anyone who does successfully innovate on a payment model is paying royalties to Steam. I <3 Steam with all my heart and can't get enough Deadlock, but let's not pretend they aren't making money hand-over-fist too