I will only add that non-standard licenses also hurt adoption, specifically in medium/big businesses/enterprises.

Most organizations understand common open source licenses and there's usually a blank statement that allows teams to use GPL/MIT/whatever-licensed software.

Anything outside that subset of licenses (even if they're permissive, open source or whatnot) requires a legal review and a lot of people won't go through the pain of that process just to use a library/service/app. It's easier to just choose something else.