Trueman - 9:39 am on Oct 6, 2011 (gmt 0)
I got invitation emails from:
Tried adstract and harrenmedia a while, CPC was way too low.
I prefer to advertise my other web projects on my main site for that CPC.
I'm satisfied with Adsense, pays well for me, but the reason might be that I missed the golden Adsense years and therefore have nothing to compare. So I can't take part in the Adsense nagging posts.