Yeah, I do that, as well. But I do it locally, as I can't get the read-events to be persistent. Nobody can, apparently, as I've never seen it work very well.
Discussion
Bloom filters
Yeah, I guess false-positives are better than false-negatives.
nostr:npub12262qa4uhw7u8gdwlgmntqtv7aye8vdcmvszkqwgs0zchel6mz7s6cgrkj offers paging, as well. And I keep track of where you were, locally.