FreedomPop is a ?freemium? internet provider. You buy the device; they give you a limited amount of free data. You can buy more data. Or, you can earn more data through referrals or sign-ups. For example, I can earn 1.2GB of free data by clicking the referral link and signing up for a new domain name at GoDaddy.
Quoted from Free Internet From FreedomPop: Hands-On and Unplugged at Home on internet – Yahoo! News Search Results