Not all non-negotiable contacts are a a contract of adhesion. Stores will rarely negotiate (in N.A.), for example. CoAs require a weaker party, who has no leve

Not all non-negotiable contacts are a a contract of adhesion. Stores will rarely negotiate (in N.A.), for example. CoAs require a weaker party, who has no leverage, and it seemingly need to be for a necessity (as part of the "no choice but to agree"). The GPL is an offer, but in no way precludes authors from accepting other terms for use of their work.