While this is not <just> a Comcast issue, there are a glut of these pieces in the news today:
Comcast: Company to Charge Extra for Internet Usage Exceeding 300 GB, Report Says
The basic premise is that network 'speeds' have little or nothing to do with congestion, but how much individuals are willing to pay for bandwidth.
Comcast has a program in place that places a bandwidth cap on individual/residental accounts unless users pay more:
Comcast began introducing 300 GB data caps for Internet subscribers across various markets in the U.S. If you go over your allotted bandwidth limit, you’ll be charged $10 for every 50GB of data you use. Or, you can opt to pay Comcast an extra $30/month to eliminate the cap completely.
Do you think this is fair? Many people are extremely negative on Comcast doing this, although other utility services (like water, electricity) also bill based on usage.