Money Paid For Focus Groups and Surveys?

Hello,

There are a few Websites that claim to give people lists of 
some 200+ market research groups, for about $35, that will 
pay a bit of money ($5 to $50 or so) to fill out 
various surveys. (paidservicesonline.com, etc..).

This seems to me to be a typical Internet scam.

However, naivity is getting the better of me, and the concept
of market research companies paying a bit of money for people
to fill out surveys is certainly conceivable.

Does anybody know whether or not there is any substance to 
these Websites such as "paidservicesonline.com", or I am
correct in assuming that it is just another scam?

If there is any substance behind this concept, can anybody
recommend a specific Website?



Thanks for your time,
DF