IANAL, but as I understand it, the parent is correct. Specifically, in contracts it is known as "consideration"; Googling this even gets you, > Consideration i

IANAL, but as I understand it, the parent is correct. Specifically, in contracts it is known as "consideration"; Googling this even gets you, > Consideration in contracts refers to the benefit each party receives in exchange for what it gives up in the contract. It is a vital element that must be present in a contract in order to make it legally binding on the parties. (though ofc., Google is also not a lawyer.) There is no consideration here. (The purchase of the product is separate, or at least, ought to be, if these terms weren't considered by the buyer then. Otherwise, it's just bait & switch.)