The terms and services also come with every SIM card.
You can stream Pandora, you tube etc if you primarily use WiFi to do so . Which most people would do anyways.
They just don't want a ton of data used in short periods of time.
I've heard a good general guideline is stick to 100mb or less a day and you'll have no issue.
~Luv to learn new things.
~Yes I have a phone addiction...and no I'm not looking for a cure!