Copy saved games to a USB stick?

I just asked myself the question: when you have reached the maximum level in a game. And you copy the game status from the ps4 to a USB stick and then upload it from the USB stick to another ps4 where the game is available but the game status is not, then you can "sell" the account without an email address without giving it up to have to or?

No, you can't. The scores are account-bound.

You can transfer the game save to another PS4, but you must then log in with the account that was used to create the game save in order to use it.