I upstreamed a 1-line fix, plus tests, at my previous company. I had to go through a multi-month process of red tape and legal reviews to make it happen. That was a discouraging experience to say the least.
Certainly easier to give a good bug report and let upstream write the change, if they will.
A tech company I worked at once had a "sponsorship fund" to "sponsor causes" that employees wanted, it was actually good money but a drop in the bucket for a company. A lot of employees voted for sponsoring Vue.js, which is what we used. Eventually, after months of silence, legal/finance decided it was too much work.
But hey it wasn't an exception. The local animal shelter was the second most voted and legal/finance also couldn't figure it out how to donate.
In the end the money went to nowhere.
The only "developer marketing" they were doing was sending me in my free time to do panels with other developers in local universities and conferences. Of course it was unpaid, but in return I used it to get another job.
Several software engineers left, several didn't sign it.
Yes, company was very toxic apart of that. Yeah, I should name and shame but I won't be doxxing myself.
Basically I got to do the work on company time&dime, but I couldn't give my employer credit, due to this kind of legal red tape.
I liked that teamlead