The enforceability of the original contract is not being challenged in this example. It’s about required notices. Basically the contract has opt-out provisions

The enforceability of the original contract is not being challenged in this example. It’s about required notices. Basically the contract has opt-out provisions that they hope you either won’t notice or will forget to opt-out of. The idea is simple, you just reverse this dynamic by immediately and pre-emptively opting out of every optional element of the contract that could cause you to incur additional financial obligation.