Can some one refresh the list of legitimte PTCs

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When i startted a marathon discussion on PTC couple of weeks a go here, some of my friends contributed with a list of legitimate PTC programs. I still have that discussion save at my blog, any one can visit it from my profile page. However in between some more so-called reliable PTCs have gone. I want to know if you still believe that there are some reliable PTCs. In my experience as far as clicking the ads are concerned, I am doing it at 1st-zone and buggabucks. The reselling advantage at buggabucks proved to be good for me.