Free and open information, like Wikipedia, used to be an ideal. I have used Reddit since 2008 or earlier because it got on search engines and shared information consistently on precise topics. Twitter used to also be this way, but now mostly only puts paid subscribers on search engines.
If you are to organize information around topics, such as a Commodore 64 community, and the protocol openly allows copies to be made via federation, I encourage people to have the attitude that information be treated like Wikipedia content. It sucks now that so much information from 10 years ago has been just entirely lost now that so many deliberately purged their Reddit comments, etc. Tragedy of the commons. And it drags down the entire planet that people squirrel away discussions on topics that are generally public. It’s like now everyone wants to monetize even their discussions on Commodore 64 or automotive repair / have behind absolute control or paywalls /etc.
I wouldn’t consider this a tragedy of the commons situation. People entrusted reddit to remain a somewhat acceptable company, and reddit betrayed that trust.
People didn’t purge their comments to remove this information from the public, but they purged it from reddit making money off limiting the access to this information.