Tradition warrants a negotiation phase when one party wishes to change the terms of an agreement, or becomes cognizant that the counterparty may wish to do the same.

The tech industry has gorged on non-participation in this facet of contract law, instead resorting to all or nothing clickwrap, which is, barring existential or egregious circumstances, unwarranted, and in my opinion, is fundamentally unreasonable, and should be an invalid exercise of contract law. Especially given the size of one of the party's in comparison to the other.