Thanks for clarifying. Didn't notice the "(?)" button, putting more info in FAQ is a good idea, as most people will go there to look for the answers.
That seems like a good system at first, but aren't you concerned that it might discourage players from placing big bets, since they're rewarded with lower HE when betting small?
How is it better than a flat rate of HE, say 0.75%?
the way it is implemented, higher bets can be accomodated with a small edge as soon as the bankroll increases. so imo there's no real need for a fixed low HE.