In answer to Mark's question: yes, there are blogs that make recommendations in return for payments. Check out this post on my blog. It's a variation of viral marketing, and it's why I posted the disclaimer on my blog.
I don't believe that the practice would work here, with all the different individuals contributing and commenting on each other's posts---but I suppose somewhere it might.
I don't believe that the practice would work here, with all the different individuals contributing and commenting on each other's posts---but I suppose somewhere it might.