My observations from promoting solely webcam sites:
JoinTheOrgy converts like mad (NoCreditCard.com)
IMlive has perhaps the best ladies and content for affs (but only pay-per-signup)
AAC is most addictive -> great recurring $$$
VSCash gets BIG BIG spenders (no per-minute rate, only bulk time)
One2One has the best video/audio/chat but not enough ladies
Spread4u has the very-nice $1 group chat ... and Derek bought me lunch
LiveJasmin has Abby so I luv them (she is almost identical to my ex-gf)
CamSense (CamContacts) converts great but only 10% payout
MoneyTree (Streamate) need to lose their splash page (can't we just link to the site??)
PrivateFeeds has, overall, the cutest/sexiest ladies but I have to confess they look a little *too* young
ItchLive is the coolest-looking site (all Flash)