I understand why you are doing this. When a MoneyPot app charges a high house edge, you can get very large winnings. E.g.:
bankroll = 900 BTC
house edge = 10%
Max profit = 900 x 0.1 = 90 BTC
A very lucky somebody could decimate the bankroll, which isn't good for investors.

But I want to plead for a max cap if the bankroll is small, but a variable one if it gets bigger. E.g.:
small bankroll
500 BTC
house edge = 11%
Max profit = 20BTC => max cap
large bankroll
6000 BTC
house edge = 11%
Max profit = 6000 x 0.01 = 60BTC
In this case it is cap'ed on 20BTC for small bankrolls, but if it get's higher, no matter how high the house edge is, it will be 1% of the bankroll. It allows for higher max profits, when MoneyPot becomes more popular for investors.