In the US? Cable TV? Cell phone service? Restaurant bill?
Especially since all of the above listed things, but especially restaurants, have stated prices and often a means of negotiating them down or being entirely un-obligated if the providing party fails too severely.
And since, though not fully related, a restaurant can choose not to accept credit cards for instance, but there's often an obligation to state that clearly and visibly somewhere obvious beforehand, and always (in the US) an obligation to accept cash for debts owed in this manner.
However, this amount is almost always stated in the menu, so it isn't arbitrary. In fact, in each of the above cases, the amount you pay is almost never arbitrary, but based on usage or a preset price.
https://www.theguardian.com/money/2024/sep/22/affordable-sha...
It shouldn't be possible to sign a contract that binds you to arbitrary amounts of future fees. When buying a property, you shouldn't be locked into doing whatever maintenance the co-property fancies unless you at least own a voting stake in that co-property. (And even then, only within reasonable limits.)
This is the same mentality that somehow sees student loans with >10% interest rate as anything but a symptom of a disfunctional economy.
At the very least, for cases like these, the government should tell scammers creating those constracts "You're free to put that ink on paper, but we're not going to use our monopoly on legitimate violence to enforce it".