Something about the design made me think I landed on a domain squatting site. Normally, I'd like to give more specific feedback, but the UI just isn't sitting well with me. The "Signup for Free" button and "Building responsive and engaged followings!" text aren't vertical aligned (too much bottom padding)..the icons are big and cheap...dunno.
Perhaps more constructive criticism:
I found the basic upgrade concept confusing. I'd dump that column, and simply add another "Feature" row, called "Upgrade to premium" and a value of $5/contest in basic, and n/a in the other two.
Why are the premium and media agency sign-up button gray and the basic and basic upgrade green?