A few years ago I started a blog where I can post lengthy stuff instead on Reddit. To have more control over my own posts and without the mercy of Reddit or any moderator. Little I did knew this was the best decision I could make, after I saw what happened after Ai hype. (I'm not much active, but still, the principle counts.)
Anyone deleting their content there thinking this will avoid selling to Ai is probably a mistake. Because now Reddit can sell those deleted content from their backup (I assume they have backups...) and no normal user can access the information anymore, which hurts the normal users even more than any Ai or Reddit.
I encourage everyone to start a blog and at least post the deleted stuff there for future access. At least you have more control this way.