You may have seen a couple of my sponsored posts that I've done via PayPerPost. This is a site where you go over there, look up their "open opportunities," click on things that you want to write about, and get paid anywhere from $3 to $25 to write a blog post about them. There are some opportunities that pay a pile more money, like over $100, but they are typically a narrower field of blogs or have specific PageRank or Alexa requirements. So far I like them, they pay me on time and deposit directly into my PayPal account, which never hurts my feelings.
So they started a new tye of affiliate signup thing, called ReviewMyPost. The way it works is like this - you put their code on the bottom of your blog post. Any old post, not necessarily a sponsored PPP post. Someone new to the program clicks on your banner and signs up with Pay Per Post. They then get a custom review opportunity just for them to review your blog post that brought them to Pay Per Post. I can't say that I'm going to put the code at the bottom of every single post I write, but I might throw it in there from time to time.
They get paid $7.50 for the review of your blog post, and you get paid $7.50 once they get paid (usually 30 days after the post is approved). This is a pretty smart way to sign up affiliates and has some potential to generate traffic for your site as well. I don't know if it's going to really generate the "thousands of links back to your site" that the website describes, but it might be a decent way to add a few coins to the coffers every now and then.