Have terms of service ever successfully been challenged for failing to meet the requirements of a contract? Like if I make an Uber account for my mom, and she uses it, at what point is she bound by the ToS?
Even where you don't make the account, a court would assumedly find she agreed to the contract by virtue of quantum meruit by consenting to have you make it and her continuing to use the account.
If you sign your mom up for a credit card in her name, what makes her have to repay the debt if she uses it?