[Malakriss]

Bandwidth is the rate of data transfer, usage is the amount of data transfered. The thread title should really be "Usage cap" despite the fact that Usage is completely irrelevant, because the past usage has zero impact on the network in the present. In reality the user that hits 250GB in 2 weeks is more trouble than hitting 250GB in a full month.

Bandwidth costs money because it is limited by bottlenecks in hardware infrastructure. The bottleneck is a faucet and Comcast's faucet is an older model with not enough water flow. Instead of upgrading, they set limits on the individual flows so they can cram even more people with the same amount of resources.

To upgrade a network, almost the entirety of the hardware must be replaced by newer more expensive hardware, because if you only replace the front bottleneck, the next link in the chain becomes a new one.