Here's one no-brainer that for whatever reason sponsor's haven't done yet. Some would be scared to do it since their sites suck, but others could benefit in a big way. This mostly effects revshare programs.

All revshare affiliates need a limited access password to see what is currently going on inside the site. Give access to everything except big pics and full length vids. They would see all thumbs (plus a few big pics) and really short vid clips. Just enough where current and potential affiliates can check out the quality and stability of the very members area their income depends on.

This limited access password would have to be permanent though. If I sign up and see how things are going in July, who's to say it'll be the same come December? If the site is updated weekly, I'd like to know what those updates look like since another site I know of may (or may not) be doing better updates lately.