Additionally, they spend a ton of money lobbying and otherwise unfairly impeding competition, so in many places in the US, they are the only option, so it's give up your civil rights to lawsuits, or stay offline (or pay a wireless carrier who does the same anticompetitive scumbag shit a heinous price per gigabyte).
The state of both wireless and wireline broadband in the US is totally broken, and it's not getting fixed because it's broken by design, as part of the general attitude by large corporate interests and cooperative legislatures and regulatory bodies to treat the US population as a sort of natural resource like a flock of sheep to be fleeced rather than as legitimate customers to be serviced (or a legitimate market to be participated in on merits).
They do this by ensuring that there is no meaningful competition, and ensuring that if you do "willingly" engage in service with them, you have no meaningful legal recourse if they abuse you.
"We're the phone company. We don't have to care."
You have no real power against them because the people who control the system have decided that you should not have any real power against them.
Theoretically, probably none. Otherwise, you'd be able to hire a hitman on yourself, have slaves, or restrict a person's free speech because they're an employee.
The reason companies went with this approach was to stop class action lawsuits from happening, which is where the real damage happens. One enterprising law firm started doing pooled Arbitrations (filing for hundreds or thousands at a time), which costs the company more than a class action would. Some companies have removed such clauses because of this.