Arguably, lemmy is going to be more private than reddit because your data are being queried, refined, quantified and categorised by reddit to be sold off to the highest bidder. If a different actor is just scraping activitypub they need to do all of that themselves.
More generally, I’m not sure if we should ever think about something posted online as being private. You can post form data that is secured to your bank or whatever but they are analysing all of that data on their side. Similarly the large email providers are aware of the contents of all your emails.
Arguably, lemmy is going to be more private than reddit because your data are being queried, refined, quantified and categorised by reddit to be sold off to the highest bidder. If a different actor is just scraping activitypub they need to do all of that themselves.
More generally, I’m not sure if we should ever think about something posted online as being private. You can post form data that is secured to your bank or whatever but they are analysing all of that data on their side. Similarly the large email providers are aware of the contents of all your emails.