Yeah, I think it's only a promotion for the first 3 months (Above posts indicate this) after the 3 months are up, there will be a house edge. I think that is why OP needs beta testers, as he doesn't know how much of an effect a 1% player edge might cause.
Even 3 days is a lot of time to put out a site for testing with 1% edge, and within that time only someone can actually destroy the bankroll of the site by flat betting.
Op might want to try his luck on the fact that most people play without considering the house edge and play using different strategies like martingale which can also easily go bust with 1% player edge. But even then , any person could just win by flat betting.