From their [Developer FAQ](https://www.mochimedia.com/developers/coins.html
|> Mochi shares 60% of revenue generated by MochiCoins spent in a game with the developer.
So yes, it could be done. It is, of course, Fizzer's decision whether or not it's actually a good idea. Another approach would be to do it like on Kongregate: let users play the game for free (without Membership benefits) and have a couple links to warlight.net in there.
Oh, didn't want to keep this gem from you:
|> We believe in Premium Flash Games. These games are high-quality, well polished and rigorously tested. The Mochi Coins program is currently only open to developers by application. All games are subject to rigorous testing and quality control before they are released to the public.
At least that won't be a problem. :D