Why non-gambling/non-crypto game developers don't run signature campaigns on here is a mystery to me. This place is the first website started by the guy who created the future of money.
They probably don't think they have enough of their target audience here to run a campaign and advertise their products. There'll be some gamers who are also interested in crypto, and that's the target audience of crypto related game promotions, regular games have other ways of advertising which has worked for them.
I personally think this place is key to the mass adoption of bitcoin, so naturally assimilating with true gaming culture in any way would help not only bitcointalk.org but bitcoin as a whole.
How does gaming culture help mass adoption of Bitcoin?