Unfortunately, broadband choices are very limited in most of the U.S. (elsewhere too I'm sure, but only know the states).

Where I currently live despite it being a moderate sized city, with an extreme tech community. Your only options are cable through Comcast or DSL through Centurylink. When you factor in what speed you can get where in the city. Voting with your wallet isn't much of an option.

Back when there was some competition and choice in my area for DSL service, my standard question was "Could I run a commercial porn busisness off this connection and max it out 24/7/365?". (Assuring them that wasn't my intended use, but I wanted that freedom).

One ISP responded by saying, 'Of course, actually until recently one of our customers was one of the biggest porn companies in the US'.

ISPs have no shame. There's hope of getting anywhere with that.

Most have fine-print in their contracts that unlimited isn't really unlimited.

It sucks.

One thing you can do is look into a business account. You pay more, but you get unlimited bandwidth, and can often run servers and such that aren't allow with a consumer account.

If you want to try to fight the issue, look carefully at your bill and what taxes are being applied. Look up the text of the laws the taxes are based upon. If memory serves one of the common taxes that has to do with telecommunications (wish I could remember the name) has certain requirements of not interfering with you usage in certain ways that /should/ keep them from capping you.

Abusive contracts are perfectly legal, just not always binding.