That sounds naive. Your contributions were only needed and possible because of the volunteers that built the community you participated in. These mode don't own your posts, you can publish them anywhere you like after the community is gone. If you rely on an unpaid commercial entity to preserve your content forever I have bad news for you.
My contributions were possible because I and a bunch of other non-mods contributed. As I said, I expect the commercial entity to preserve my content until the entity decides not to, not some random third party.
My prior experience moderating other forums tells me the contribution of these community moderators are often way exaggerated and usually easily replaceable. Some form personality cults and periodic rotation would actually be a good thing.
Pretty sure taking the subreddit private as a form of protest is an unintended abuse of "delegated responsibility", and they can take that back at any time. Which is what they are considering anyway if gp is to be believed.
