Although you will enter your cc info, you will not be charged during your first 15 days while you build and submit for the $500 prize. If you don’t want to lose your progress make sure not to cancel. And you can cancel anytime thereafter. If you do not cancel you will be charged for your first semester.
When you build and submit, you’ll be entered to win $500 for your campus and $1000 across all campuses.
With your .edu email address you save 75% (normally $197/month).