I'll second this, we put together a system that did this around 2008 and while it worked out well initially within less than a year it became a loss for our company. We couldn't charge much for the data as even with large amounts of filters and detection techniques for bogus data and users the results were so bad no one was willing to pay for them any more. Within a year we scrapped the project and ripped it out of our ad system. People are more than happy to answer a survey to get to paid content, they are also more than happy to supply bogus answers to the questions.

That being said, I'll be interested to see what, if anything, makes this different than all of the surveys running in the affiliate marketing/lead generation space.