Tachiyomi is excellent for comics even though it might seem like (and originally is?) a manga reader.

I use it with the Komga plugin to read comics from my self-hosted Komga server.

With only around 100k users and most people using anonymous usernames that cannot be connected to their identity it would hardly be worth the effort, time or money.

I agree with this. I have been using Pocket way before it was integrated into Firefox and tbh the extension was much better - seems like after tying it to my Firefox Sync account I have to relogin every few days to get the “Add to Pocket” button to work. The extension just remained logged in and stuff worked.

I’m intending to switch over to self-hosted Wallabag though, for privacy and efficiency reasons.