When originally creating the back ends for the games that interact with the block chain. We realized there is actually no way to offer free game play with bitcoin or ethereum due to the high transaction fees.
The is when we decide to go with a private Etheruem network and our own block chains.
People can play for free and earn game profits.
Now that being said , if you have a game you specifically wanna use another crypto currency, just contact us we just need to enable the options.