I had problems with CJ but not that. For example, some of the companies that I wanted to advertise were deactivated. And I made two sales which I knew of but never got commission. I did get commission on other sales though! I tried to contact them but their contact link was broken. Finally I found a working contact link (before the user logon, not after) and I never got an answer.
I recommend another one I found which started to get me commissions and which has very good features and easy to use. It is shopzilla. The commissions are probably small because that company is already a via to other companies. But the advantage is they have EVERYTHING and good links - such as links to direct search results, categories, pages, anything. I think it is much better for people who are first starting out. You can see an example at:
http://anakaonline.blogspot.com
I also have it on some other sites and I make more money with Shopzilla than any other affiliate program, even though the percentages are lower. When you see how it works you will understand.