Success with Study Blue

So far, I'm impressed with the earning possiblities of studyblue.com I've only been apart of the site for about a week and my earning are at 67.00 for only uploading 10 files and one set of flashcards. Rewards are earned by your fellow students and other members clicking on your files. This is the only site I've had success in earning money so far. All of the survey sites I've earned points but not enough for cash or rewards. I've had offers for paid surveys but in the end I get half way through a survey and then it says I'm note eligable to finish the survey for money. Here's hoping for tomrrow and I'll keep you updated on study blue if I get paid when I opt out for money.