I have tried couple of trafficprograms. I think http://www.linkreferral.com
works at least somehow. It doesn't bring so much traffic, but it brings quite usefull traffic and some of them review my site, so at least they read my site
bring quite lot visitors to my site, but I think almost all of them was quite useless because they wasn't intressed my page.
I am still looking better ways to promote my blog, but haven't figured out how to do it best.