Basically you get virtual money that can be used to buy things for searching stuff on search engines. The purpose is to push up certain key words in search engines. From what I understood, although some people had strange login problems, a lot of users did get free stuff for spending time searching for things they don't really care about online.
To me that's really in bad taste -it's a way for corporation and ad agencies to promote certain topics and products by swaying the search engine popularity searches. It's a lot like trading stocks with inside information - something that's supposed to be only effected by the randomness of the market get pushed and changed by corporations with money (so that we get a possibly false data in which people care a lot more about saphora make up then about the war in Iraq or about starbucks coffee then your local coffee place).
It's not a scam, it's not even illegal, but by my standards, it's immoral.
