FreedomPop is loaded with hidden charges - even if your billing shows $0 due you may still be charged. They have a variety of hidden "services" that are also billed but aren't considered part of your 'Plan' since they fall under services. Ignore the next payment amount due on their home page and make sure you look at ALL their pages to see what other charges you will incur. It takes a lot of work to get their "free" service to be free. Also note that once you navigate through their maze of hidden charges and get to actually not paying them anything, they will throttle your speed.
We apologize if this was your experience, Stone R. We do our best to be as transparent as possible with any potential charges by disclosing them prior to checkout and reiterated them in a follow-up confirmation email. You can also check any associated charges by logging into my.freedompop.com. We certainly will not throttle you for not being on a paid plan.