These are the NIP-95 event kinds that store user uploaded media.
Discussion
So if I read this correctly, a relay that supports NIP-95 stores messages that incorporate the images?
Instead of the situation now, where we refer to a url on a hosting service?
That is great news, it will probably drive the pay-per-post or pay-per-90-day-storage and similar relay option 😃
Or, as in your case, not storing or relaying then at all 🤔