It has always been my wish to post here only those sites that work for me, but it is also true that some of them worked for some time and then suddenly stopped.
The thing that makes me most mad is that admins usually tell you nothing about their sites being closed, stopped, failed.
I think that is should be one of the first rule to follow when you're dealing with other people, count on them, a part of the "net-etiquette" Businesses fail, we all know that but telling your members that something went wrong and that you can not go on should really be the owner priority.
There are some other ( maybe even worse) that are actually working but are not willing to pay you what you have earned (PC is one of them).
Some others are Royalty7, WCA, BamPaid, Global Oil Fund - to name just a few.

There is one site that I joined recently and that works fine for me:

http://www.hourlyrevshare.net/?ref=viktorija

 I started with $5 only and have already collected the 3x greates sum.  There are some other that work fine, but I'd not like this post to look like a blatant ad.

If you'd like to hear more from me and my experience, you can find me here at apsense.