Just interesting, what is your business model which makes negative house edge profitable for you?
The negative house edge or positive payout percentage is generated by the progressive jackpot attached to the roulette table.
It is built up by keeping a percent of player losses from the house and adding it to the games jackpot.
This allows us to safely operate with razor thin margins, eg our Jackpot Dice game has better payouts than satoshidice and lower house edge which might not be possible to run safely without using a donation percent and progressive jackpot.
It is mainly about the experience for us though we do appreciate any money made along the way.
