How to make money with Sponsored Reviews?

The pioneer in this route is PayPerPost, they began with lot of controversies since one needs not to disclose the paid post for the review in site or blog. However sooner, many followed them spreading paid blogging model.
You can join one or more of these networks and write paid reviews. You get to write on various topics, so not all the bloggers or site owners are ready to write for payment since that may affect their editorials. But those who are doing this are making good money on it. Even you can bypass the middlemen, if you have good traffic to your site and write paid reviews for advertisers directly then you earn much more.
The under mentioned sites are offering sponsored reviews and paid posts:
PayPerPost
Sponsored Reviews
ReviewMe
BlogVertise
Smorty