I know lots of you must of heard about http://www.payperpost.com/
If you don't, it is a site that pays bloggers to post reviews about companies, services or websites. There are bloggers making a living out of blogging.
Everybody that knows about http://www.payperpost.com/
knows that this site offers this oppertunity, which is getting paid for reviewing blog posts. Nowadays you even can make money getting your blog post reviewd, you also can make money recruiting bloggers to do the same.
This earning oppertunities is great. That is not the only thing, when a blogger review your blog post they will put a backlink to your blog. The more backlinks you get higher your blog will rank at Google and other search engines.