The reason why many gambling website include Dogecoin is because the transaction fees are VERY cheap.
For BTC its usually 0.0001 but for doge is 1 which is about 0.0000007 BTC.
I see. That is indeed substantially cheaper. Although, at BinaryBase and BattleBase, we actually pay for all the transaction fees from our own pocket and it hasn't been an issue.
Having said that, dogecoin is on our radar now and our engineers are thinking about how to expand our services to accept dogecoin
In my opinion I would just leave BTC and avoid Doge or LTC.
The transaction fees are higher but many can simply store it on your website. I think leave it the way it is.
Doge would be better for maybe faucets sites or sites that require a lot of back and forth transactions.