[pabs3]

I've had success asking for paid feature development on random GitHub projects the company I work for depends on. I had no involvement in the financial side of things though, just writing up the issues and verifying the results.

OTOH on another project where the company wasn't willing to spend money on commercial support provided by a company related to the project, they strongly tried to push us towards paid development even though I did extensive debugging on the bug we found and tried but failed to fix it myself due to the complexity of the codebase. Eventually they did fix the issue without paid support though, luckily in the interim we had a workaround.