playBunny: If I understand the present tournament system correctly, I also find it perfectly acceptable. The general ideas of tournaments with entry fees and prize money are :
1) To attract strong players by giving them the possibility to win some money.
2) To attract weaker players that have no chance to win a prize by giving them the possibility to play strong players against some little money.
That the organizer takes away 30% of prizes does not cancel any of these two reasons. And in fact, in our case these 30% could well be explained by the time, energy and potential loss of image for the site induced by fighting cheats :-)

On a different note, now that I read the user agreement again, it is indeed very clear about computer use, but shouldn't it also state that it is illegal to get counseled by another player ? I know that this one is hard to check, but it wouldn't hurt to make it clear to fair players that might not be aware of it, would it ?