I prefer sending to PPS programs. It's not so much a question of whether over the course of 18 months whether you'll make more with revshare than PPS... you might make a *bit* more with revshare if the site is very niched and has an amazing amount of content and frequent updates (such as single girl sites)....
My bottom line for choosng PPS is that I remember companies like "busty amateurs"... who shut down owing millions to their partners. If you choose revshare, you're not just betting on the members area and billing options, but the viability of the company too.
Not to be a nay sayer, but what happens if they lose a merchant account or get sued or if their biller goes under etc..etc..etc... i prefer to just get my money now.. as Rrred said...
I prefer the quick buck
