Why YSK: you can recreate the old Reddit experience by using this frontend for those who have always used old.reddit. It also gives a nostalgic feel, is more efficent, and loads faster than the Lemmy interface.
You can run your own docker instance if you don't trust them. The code - along with an example of how to run it - are here https://github.com/rystaf/mlmym
Hmmm yeah this does seem to be proxying login info. Ideally it would be done like elk.zone and mastodon where it kicks you out to an oauth flow that returns with an app token you can later revoke in your account settings. But I'm guessing that doesn't exist for lemmy yet.