Id be interested to try this but it looks like an easy way to lose .5btc. I cant quite work out why you would be willing to make losses on everyone that bets. Its easy to know why you would want a lot of people to deposit onto your site for an easy exit scam (im not saying your going to do that) but not so easy to see why you would be happy with losses unless its purely for advertisement.
It is to let you all test our system with a slightly more elevated amount than a 'regular' bet and give you the chance to win some money risk free.