site seems pretty solid, hope you get more investments soon

Thanks you! Yes we still need to work harder to raise the investment for the bankroll, adding multi kelly feature is one of our step to make the investment more attractive.
So tried with 0.02 BTC and it did not end well

Is there any actually proof that the house edge is 0.5%?
Sorry for your loss sick. You would've lost more if you played using 1% H.E. Mathematically, in the long run you will lose twice as much compared to 0.5% H.E.
You can test the house edge by this formula:
house edge = 100% - payout * win chance
In your case of 50% win chance and 1.99 payout, the house edge is:
house edge = 100% - 1.99 * 50% = 100% - 99.5% = 0.5%
If you were using 1% edge, the payout of your bets would be 1.98, this means less profit on your winning bets
