Why give away so much margin? You could always price your game at market levels and reduce the price per game if you aren't seeing enough play. OTOH, it is a lot harder to just raise the price after starting out with 50 cents up to 3/$1.00 bonus play. Even if you own the location and don't have a split or are in a high traffic casual player location, I think you are making this harder on yourself than it needs to be.