Now I have been thinking about this same topic in similar ways but my take on Crypto in gaming is that the game would be free to play but the in game currency would be Crypto. At that point all in game player transactions would have a 10% tax applied to them. 5% would be profits and the other 5% would go into a pool that is utilized to reward players for regular game play like opening treasure chests ect.
Players buying items from NPCs would be split 70%-30% as those would quite literally just be micro transactions.
This would of corse mean having to have a game that is very player driven like an MMO though. advanced crafting and gathering systems and a dependency on the economy would be a must. People would be able to mine ore from a cave and sell it for Crypto to spend on snacks outside of the game or better gear in game.
Yes, I think the key though would be the method you use to insure you can continue to function as a company, and that is where steem power can come into play as you cannot give that away. Steem Dollars would need to keep being reinfused some way. I think you may have been considering people buying directly into that pool. I may try some of this pretty soon, but at a very simple level.
My game project that was greenlit is not really some place I'd do a ton of this, but I thought perhaps I would make it so anytime someone completes a single player level, or multi-player level the players are awarded some steem dollars (if they put their steem account name, and public key required to give them money). I would post updates and interesting things related to the game and hopefully fund the game that way. The game would work with or without steem. So it is more of a gimic and added incentive for steem users if I do this.