Renton you bring up a valid point, but I think that they have just enough to make it worthwhile to play for a set, expecting to get their whole stack if you do hit that set.

1/8 times you hit a set right?.

12 x 8 = $96 total

The one time you hit your set, expect to get paid their stack, so in the end they are making a profit.

But if you dont think you can get their stack, a fold is not a bad option at all..