Adding in altcoins would be good for the site in long term, Litecoin transaction fees is way much more cheaper than bitcoin, Ethereum is also another good alternative too, as I believe there are a lot of players who would like to play on this site more with some other altcoins.
I think they will add more altcoins in the future but you can try to win using bitcoins now
. As I understood mamounia1991 gives away free bonuses. I'll try to ask her soon