I use them, but I won't be using them for much longer. I have sent them nearly 1000 impressions and have only had two clicks which have earn't me $0.10.
I would have more clicks, but my visitors can't hardly see the allfeeds ads as the text of the ads is orange where the background of most of my pages nearly clash with that colour.
I have email Allfeeds and they have replied back many of times, but it has not been fixed yet.
Infact, I sent another email and they did not reply to it as of yet, so they may have stopped responding to my emails.
