Cryptofree is the name of cryptostorm's free VPN service.
It's only limitations are that there's only one server to choose from (in France). Also, it doesn't include any non-essential features such as transparent .onion/.i2p access or port forwarding. Other than that, it's setup exactly the same as our paid nodes. Same cryptography, same security features, same no logging policy.
Anyone is free to use it for as long as they like. There's no time limits, so you can stay connected to it as long as you want. There's no longer any bandwidth limitations on Cryptofree.
cryptostorm pays for cryptofree. We make money off of cryptofree because cryptofree is in itself an advertisement for cryptostorm. We have no need to do any of the above schemes to make money off of cryptofree, and if we ever tried to, it would make cryptostorm look bad.