I’ve been a Linkshare affiliate for a few years. I’ve been very pleased the the choices of merchants and offers. They have some great tools, making it easy to develop links and feeds to automate your advertising program. I’m by no means an expert at it, but I’m happy to report that Linkshare lives up to their end of the deal, and consistently sends payment in a timely manner.
My blogs aren’t at a pro level, so I haven’t been accepted by a few of the larger merchants; there are so many to choose from that that is just a blip of an issue.