"I would guess that they expect the link to be built into content, something that I have done when putting reviews on line. The idea is that the punter is more likely to follow a text link than a banner link. If that isn't your field then move on to something that is. "
Ahh makes sense now. I get it. Yep, I've seen that.
"My experience is that if you use an affiliate banner and an Adsense ad in the same way on your page then Adsense will get a massively higher CTR. "
Now that's something. Can you explain further?