Broni, check your contract on your ISP service if you have it. Most state that there will NEVER be a limit, and the company cannot render that contract void. Verizon, my fathers ISP, has tried to impose false charges and increase the amount he is paying. He settled that with a few legal threats due too the fact that he has a hardcopy of his ISP contract. They CANNOT change the amount charged and they CANNOT impose fee's unless it is a service he legally subscribed too, even then, that service would be SEPARATE from the contract.
I'd advise some studying for Comcast customers. Get your contract out and figure out if you, or they are going to be the ones screwed by the limit. The contract is there for a reason you know..