Hello, has anyone tried to advertise using companies like: http://payperpost.com/ http://www.reviewme.com/ http://www.blogsvertise.com/
I've never used them, I signed up to one of these sites before but there weren't any products in my niche, it's worth checking out because you might be able to make it look natural but I don't really like the concept I wouldn't want to post a cell phone review on a sports blog, you know, it's worse than pop up ads in my opinion.
I used review me and they kept billing me after I tried to conceal and cancealing was hard to do or find.
Payperpost seems questionable because it losing blogger confidence, Google has punished many bloggers for sponsored reviews.
I have used reviewme.com once. Wrote an article - they paid me $5. Everything turned out OK. I have subscribed to their RSS link that notifies me whenever they have an offer in my field(personal finance) - I have only seen 2 offers during the last year, so it is pretty pointless but I would still use them if something decent comes along!
I worked as a publisher with Blogsvertise and reviewme and had really good experience working with them