It's a fork of Ublock origin and merges upstream changes so there's no reason to use both.

The error you're getting with SSH isn't a problem with the pi, your local user is not root which means you cannot bind to any port <=1024, try listening on local port 8080 instead with -L 8080:localhost:80

Why is the website http only?

No Karma?

I've deleted the old app and just put my current Lemmy app there, when Sync for lemmy is published I'll replace it again. This way I don't have to change a thing about my habit

It was good for finding useful information online and doom scrolling, now it's reached its EOL