No I don't use Moneypot.
From what I see Moneypot uses "bits" as currency.
What you want to say is that some casinos use different exchange rates (and give more or less chips to players)?
?? You use bits. You host roulette.
IMO roulette should use chips.... chips should be nominated standard way (any chip should have standard color/value)....
Regular casinos use different exchange procedure. For example when you make deposit - bitcoins converted to dollars with the current rate. Few days later you withdraw bitcoins. Them will be converted with different rate.
The point is to have deposit and all operations in bitcoins (that's why it's bitcoin casino), but chips nominated regular (familiar to gamblers) way.