Every manga ever

You got me lol

They will: https://blog.google/technology/safety-security/updating-our-inactive-account-policies/

Business accounts will not be affected.

Seems like it’s a web client that’s focused on mobile experience so not a mobile app. I may be wrong tho.

You need only one account, it’s just that interacting with content from other instances is VERY underdeveloped and it takes you outside your instance because of how links work.

Edit: No idea about apps, I’m using official app “jerboa” and will check out other apps once they are more developed

This should help you a bit with understanding lemmy: https://lemmy.fmhy.ml/post/24569

There’s an issue on github in the works that will keep you on your instance when clicking on links to communities.