Not sure if anyone else noticed but reddit is now testing a beta of an answers feature that generates answers based on reddit posts. Maybe this explains the phenomena people noticed of deleting posts only to have their posts reappear? Just saying if reddit was already bad for privacy it just got worse in my opinion.
The difference is I (the contributor of content) have the same access as anyone else to the data, and could use it for my own purposes if I wanted to.
On a platform like reddit, access to the raw data is controlled and cannot be format shifted / used in any way I wanted to.