GUBA is really nice and offers recurring payouts. Payments are made twice per month and you can opt to hold them back if you would like. They also have bonuses once in a while. I've been with them for 3+ years now and spoken with them on numerous occassions. Very good company to work with.
AdultPlatform is also very nice and has recurring payouts. I've been with them for about a year now. They have a number of programs as they run a number of sites. They also offer rotating content you can use on your own site. They pay out bi-weekly. Nice company to work with.
Those are the only ones I know and use that are two-tiered.
I neglected to mention, GUBA has recently been pushing into the more mainstream areas as well and not only offers adult content but music, movies, television and other multimedia as well.
