I play slots on mBitCasino with rather good luck, and want to try other site.
I already know of most Bitcoin casinos however I want to know where you have won.
I like 4grinz.com they have nice slot games and won quite a few times on their gameart slots. They also offer 10% loss back every thursday which is what I like on the site and you don't need to rollover the amount unlike on other site you still have to rollover the amount like 5-10x before they unlock the amount for withdrawal.
I think they gave such promos to early members and they have membership pattern, right ? I guess its always cool to get some cashback or lossback but make sure they are legit bro

because whenever I have got some free spins ( in bet365 ) I have just loss only and giving me a feeling of rigged slots.