I only have my xapo wallet on my phone and It's fine for now
I registered on Xapo and started to play on December 20, on December 24 I withdrew 2800bits=1,23$, today December 27 and I have on my wallet 0.90$(2,181bits). So for first 5 days =1,23$, then for 3 days=0,90$(it depends on how much you play). Of course with referrals you can earn more, because you get 50% of their claims, but It's hard to get referrals because this games are sideapps. If only they add them to play store, that would be great. But I don't think that it is gonna happen, because they have their own shop.