It really depends on who was negotiating, whose paper was used to write the contract, and how much each side wanted the deal. Legacy enterprises like Disney often force vendors to use the legacy company's paper, which case substantial protections would be written in or the deal would not happen.

Self-service web services on the other hand generally come with take-it-or-leave-it conditions of use. When's the last time you redlined Github terms of use when starting a project? ;)