I make more money from AVS sales than sales to sponsors (or even from my own paysite, but that does not prove much, my paysite is shit). However I mostly push big AVS sites (1000+ pictures) with monthly rebills like this one:
http://www.pp5sex.com/lesbians/ and I occasionally use a pseudo-paysite style tour like this:
http://www.pp5sex.com/lesbians-2/ so this is not quite the same as the 30 pic quicky AVS site that most people set up.
With the smaller AVS sites I gave up on setting up smaller sites to upsell sponsors, as I found this less time effective than free sites. I still run a few small niche sites that make enough money from sales to make them worthwhile. But these tend to be very specialist niches.