@OP Can you explain how did you calculate the house edge? I'm not an expert in this but would expect to receive 1.99*my bet if the HE is 1% ( you offer only 1.98*my bet ).
1.98x is 1% house edge. 1.99x is 0.5% house edge. Google for more...
OP, you 1st need to add bitcoin and then may be a wagering contest will be the best way to promote your game. But with escrow of the prize. Otherwise nobody will participate.
Thats why I asked how it is calculated as I have no experience and just tried to apply common sense.
I did some quick googling and found this formula: House edge = 1 - (return / loss) (source) which gives me -98% ( assuming this number reflects the 2% HE).
Feel free to educate me.