If you stay within the purchased usage, you come out ahead. But the overage charges are probably where FreedomPop makes most of their money. Great for me--I'm a single-person household with a limited use case for FreedomPop. Maybe not so great if you have multiple users all pulling from the same pie or if you are a power user. An internet search for FreedomPop uncovers a lot of posts from folks who didn't pay attention and got burned. I've never had an issue, but I monitor my use closely. I'm about to bail on my home phone with internet included because I have a work phone that provides unlimited internet usage. I use my FreedomPop account for things I wouldn't necessarily want my employer having easy access to. There's very little of that--personal banking, setting up flights and hotels for personal trips--and FreedomPop gives me enough at a reasonable price.

To me, it's the opposite of all-you-can eat buffets: sure if everybody eats like a pig, the restaurant can't make money. Flip the business model, and you've got FreedomPop.