It is not a good future, and at least in Amazon’s case jeff@amazon.com works as an escalation route.

My gmail account with the same username got banned in 2007ish in the middle of college, I definitely feel the pain of no recourse. I lost everything - calendars, todo lists, email and had no way to get the underlying data or do anything about it.

My hope is that at the end of the day a corporation is made of people (legally, this is why they have 1st amendment rights in the USA) and this will prevent the scenario you imagine because the money of those people will be at risk.