@mholiv tried to look at MPL 2.0. Too long, didn't read, lol. Maybe later I'll look at it closely.
@mholiv yes. Literally the reason why I use MIT licenses in my software. It's possible for real people (same as me) doing real work to use my software legally and I don't care if they hide their patches from me. I don't really care about them at all - I just supply software as it is.