It's called Review My Post, here's the fun little button.
The way I understand things, you add the code for the Review My Post button to all of your blog posts, even if you don't take sponsored ads from PayPerPost, you can still earn money with this little opportunity.
So, you've got the button on all of your posts and let's say I'm not a member of PayPerPost, I click on it and sign up and a special opportunity is created for me to write a review of your post. It could be a post about about sledding, your grandma, or your precious new puppy, whatever the case, I would get money for writing that review and you would get money because I wrote about what you would blog about anyway. How cool is that?
So click here: Sign up, review this post and let's both make some money!