1. Who will play poker if mucking will not be available? You must be kidding...
2. To make poker site profitable is not as easy as some think. I saw already plenty of sites going down, just because players abuse freerolls and don't play ring games. It is all about balance. If getting money with freerolls is easy, why to play rings? Probably seals is one of the sites still there. So probably you may want to do something similar (i mean points system and so on)