Deleting a post is simply marking a piece of text so nobody sees it, but I think the text is still stored in their servers.
Furthermore, a large company like reddit, must backup regularly, meaning there must be several copies of my posts in several SSDs. If the backup once a day… some of my posts are 5 years old.
Companies exist to make money. I suspect they just marked my posts not to be readable by anyone, except staff and they can still monetize them.
Am I wearing a tinfoil hat way too often?
I doubt your history is on SSDs specifically, but yeah, I would assume they have it, even after I used Power Delete Suite and completely closed my account. They gave backups of posts/comments before they were edited.
The whole reddit API change was about controlling and monetizing their massive dataset for LLMs like ChatGPT. They are going to keep “your” data because we all signed it away after skimming past the Ts and Cs.