This is ridiculous. Great engineers should be incentivized to work on open source projects. Would you rather the engineer and project get absorbed into a company like google? Because that's what will eventually happen if the developers don't feel like they are being rewarded for their work. They'd rather go somewhere where they feel more valued.
- I don't hold any opinion on how to solve this problem or if they should get paid or not... consider this, 11K is the Yearly / Half yearly salary of a mid-level developers in most parts of Asia, double it and you can hire a decent senior developer for that price..
I can understand the dilemma the person is in, but, making 11k a month, this person is part of the top 10% of the richest people worldwide.. little hard to care too much.
I'm also unconvinced by the "most popular tool" argument. Sure a huge amount of people make use of babel, but it's only a (very) small part of the complete tech stack an average company would need. I.e. database, frameworks, other programming languages, nodejs, deployment and management tools, the underlying OS; there are dozens of dependencies that are critical nowadays, all which need to share the available donation pool.