Since today all of our bets are now provably fair with a chance of doubling your chip equals 15 out of 32 (which is around 47%).
Does this mean house edge is more than 5% 
If yes than that is really huge and I don't think any wise guy will bet on your platform. I don't think gambling and mixing mix well however I have to say what you have developed is awesome and quite unique and easy to use mixing service.