At the time I signed up, I had the impression that it was a legitimate -although low-paying- way to earn money. But when I tried it for myself, they paid me next to nothing to allow them to flood me with ads. There were some higher paid activities I could've done that might earn me near minimum wage, but those asked for my credit card information at the end of a very long survey, or mysteriously cut off and I couldn't figure out how to finish the activity, crap like that, so I never did them. I did give out my phone number, and I've been getting scam calls ever since (about a year ago), even after I signed up with the Do Not Call Registry. I didn't bother trying to earn the minimum amount ($30 I think?) to get paid.