Reading the parent post, I found the monetary aspect less as some kind of anti-capitalist moralism, but more an observation regarding incentives:
There's nothing wrong with making money. However, when your historical business model relies on leveraging monopolistic positions to make said money, any contribution you make is tainted by your ultimate goals of embracing, extending and extinguishing competition to those monopolistic, proprietary offerings. I simply don't trust Microsoft: anything they present isn't a Trojan horse of one flavor or another; proprietary addons in vsc, all the Github nonsense, poisoned "foundation" governance structures - all of it has the effect of luring developers into doing work that benefits the Microsoft ecosystem over open ecosystems. It is naive in the extreme to assert that just because a benefit exists in any form, all harms associated with that benefit must be ignored.
Nothing wrong with making money from software. Lots is wrong with Microsoft attempting to bamboozle developers out of the rights to their work in a transparent attempt to extend corporate lock-in. When Microsoft GPLs their codebase, I'll take their contributions to open source at face value. They can take donations like everyone else.