1000 CREDITS = 1 BTC. After you fulfill the 10x wagering requirement on the bonus, you can withdraw to a Bitcoin address.
Thanks for the explanation, but those requirements show that you are 'not' giving out "free" bitcoins.
If your site becomes popular, and I get enough good feedback about it, it might qualify for the "not free but popular" category.
Or if you offered some kind of referral program ( where people could make some BTC without actually needing to gamble
at your site, or jump through any other kind of hoops ) you could make the list as well.