The thing is that RO is a dying game (except in some Asian countries). It's old and people are lazy, which is why low rates these days are not very popular anymore. People want to try the newest things as soon as possible, no matter if these things are good or not. This is the case with 3rd classes, too.
I can see how on high rates or super high rates it can't really hurt to have them. These kind of servers are in 99% of the cases already unbalanced, buggy and just plain crap. But on mid and lowrates? Heck no.