I was a member of some (actually, quite a few) of these sites before. I had over $100 in AYS when I finally cashed out for ads and left. I lost interest in PTR sites after a LONG time of doing link upon link for a couple years or more. Unless you have several referrals or doing these to place ads, it's not worth it for the most part. I did get paid by a lot of sites but, it took forever! My favorite before the owner change was mental emails.
Best place to read about PTR before joining is here-http://getpaidforum.com as well as the boycott site you listed.
I am a member of redneck clicks and have been paid a few times. Just takes a long while to build up enough cash. No limit payout so if you need a few cents, it's not too bad.