Many casinos even non bitcoin ones pay out on bonuses like that. I've had several friends who have won big on free signup bonuses. Apparently you haven't heard of false advertising, its illegal, and most places don't do this. Sure doesn't make me want to deposit there at all with that little game they play.
How come so many other casinos don't do this shady practice and actually pay out from free spins?
Makes sense. Fact is that this site messed up royally once and made a comeback, but they clearly didn't cease some of their shady crap which anyone with a half-decent brain knows without doing much research.
They aren't a total scam site like 1xbit or something, but they do screw you out of their promotions using unethical methods here and there.