I remember doing this on Gaming Lagoon. It was ok, until they changed the point structure. At 1st you got like 50 cents for most surveys, so you could build up money pretty easily. In 1 week I got 12 points and bought my Acekard 2i from them. Then they change it and gave you like .0000000001 cents.
The site is no more either, only the forum is there. I think they got bought or something.

Then the other site I went to, also got bought out. . Luckily, for the returning members they carried over so many points.

http://www.e-rewards.com/

This site doesn't spam your e-mail with ads or anything like that. They just tell you when a new survey is up, and you pretty much get all of the points. The rewards blow though. Maybe good if you like to travel, because they have a ton of plane stuffs, like free tickets anywhere in the US (it is regional, I live in the US, so i enter the US site), ect, but nothing much. The only think I want is the Gamestop gift card for $25 (sadly, no option for $50). I already have enough points, but I would love if they added Amazon Gift Cards.

I assume Points2shop is like gaming lagoon, fill out surveys, get spam e-mail, fill out a 20 minute survey, get no points, ect, correct? I used GreaseMonkey to skip everything and used 10mintue e-mail for the spam control. I used my grandpa's house for the address, and he would have a ton of spam mail. Lol, infact, my dad called the cops to investigate, and they said they were using his house to traffic drugs, lol.