i am currently working on a in-app faucet ( Bitcoin slot machine ) in an Android-App.  The machine is working fine but now i am thinking about the payout rates - there is a Chance Symbol which gives you the Chance to make a bet and get max. 5 times your bet ( but you will have always just 1 time - so you cant loose anything ).

Of course for bringing it out on GooglePlay i need advertisements, and this is my next question : I try to get interstital ads working, or does someone think just banner ads would be better ? I thought about it but i want to keep the screen free from banner ads ......

By the way : It is not a Casino because you cant top up your account for using my slot machine, it is just a faucet where you always get some extra satoshis if you are waiting at the doctors, in the bus .... everywhere else as at home.