[hobbes9324]

Players pay rake - if players BELIEVE (accuratly or not) that a site allows some players an advantage over others beyond their personal skill in playing, it would seem likely that players might choose to leave that site for another that doesn't allow it.

A player's interests, and PP's don't necessarily concide.
What I'm trying to get at is that for PP, any perception that the games are anything but totally honest would be a disaster. No matter how much a single player or group of players contributes in rake, it pales to the amount in total that they are taking in.

Additionally, where will the sharks go if they are barred from the aquarium?

And I agree that the comparison between card counters and online poker is a weak one - what I was trying to get at was
that the operator of a business will bar, or try to bar, any players that may have a negative effect on his income - directly as with a card counter, or indirectly, as above.
And I don't see anything to stop PP, or some other site, from doing so.