Steam gambling would imply the skins can be deposited. Thats slightly controversial as Valve doesnt encourage use of skins as a cash proxy. Some old sites I used have turned to using a secondary site to take skins and then forward a credit balance to the actual gambling site.
If this forward transaction was done via crypto currency of some kind, hopefully one with low fees and fast easy movement then it could be interesting. I favour the POS coins for that kind of simple use as the network is run by the users wallets not some foreign miners ramping up fees.
I dont see any example of Green Button usage, ie. actual steam integration and thats the only reason I clicked on this thread. If you want to sell a service then its going to need something to view surely
A smarter deal might be some kind of % fees take on the success of a site that is setup, franchising can be far more lucrative. I would consider that path if you are genuinely able to setup people up fast with working operations
