I understand that GNU ELPA is the official GNU Emacs package repository and is the only repository enabled by default. I also understand that submitting a package to GNU ELPA is a bit of a hassle and requires an FSF copyright assignment meaning that the official repository has a limited selection of packages.

Correct me if I'm wrong but a copyright assignment is basically transferring ownership and rights of a specific creative work or works to a third party. So in this case, the third party would be the FSF, right?

Where as with NonGNU ELPA the FSF doesn't ask for copyright assignments for packages meaning they won't be able to go into core Emacs? NonGNU ELPA isn't enabled by default..?

If anyone has a simple, less confusing way of explaining this, please leave a comment. Any feedback is greatly appreciated and I thank you in advance.