Working for a F500 company, I have tried to use budget surplus to reward open source projects we use. Management looked at me like I had grown an additional head.
this is my experience, too. they'll gladly take, take, take, take, take, and take some more, but when it comes time to give just a little bit, they balk.
"We've never heard of that happening, so no."
I'm almost willing to bet that you did more than good enough work and if you still want to become a (n even) great(er) programmer I'm sure there's quite a few OSS projects you could contribute to as well if you wanted to :))
Re:matching it you could also spread it amongst a couple of projects.
Anyway have a great day
This is their repo: https://git.proxmox.com/?p=pve-manager.git;a=tree