Imagine if you were trying to advertise something, you needed a stake.. and your advertisement was buried with 20 other ads that were all non-sense..
I wouldn't be happy
If there are too many people posting, then just raise the price! That should weed ads out. And since you can only have 1 ad at a time, that makes the assumption there are 20 people that would post nonsense, usually it's just 2-3 trouble makers at a time.
I'm gonna give that bitch a freeroll, bitches love freerolls.