Comcast has started data caps on people at 300 gigs. If you have a family with 2-3 teenagers and they love Netflix, Hulu, Youtube or other online streaming you can easily go over this limit and be charged $10 for every 50 gigs you go over leading to a very large cable bill. Comcast is doing this so that you will stop using their competitors like Hulu and Netflix and use their movie rental services and dvr which do not count against your data limit. We need to stop monopolies like this. It is unfair and unethical.