I will happily profit from the work FB has poured into all three of those technologies and smile knowing they won't make a single cent from me.

Facebook is not lacking on the problem in their web tech either. Like how terrible it's maintaining (or the lack of) flow. It's buggy as hell and I wish I didn't choose it couple years ago in my projects

And for React, the head of React left FB because of the hostile working environment earlier this year. https://www.cnbc.com/2019/01/17/facebook-manager-quits-after...

Facebook led the way in frontend. But for future candidate, the important question is, if they have faith that FB will continue to lead that way.

Sure but no company is going to be perfect and I’d say their track record of maintaining tech is better than Google’s right now.

That is a fair point. But, that's not what the topic is about. Just because they contributed to front-end development doesn't make them any less questionable. Not saying I wouldn't want to work there myself. They do some good work there i'm sure.

There's still much more chances that you will end up working on some Ad-Tech at Facebook and not cutting edge open-source development. As for the brand not being any more tainted than the other tech giants, I think the article shows the exact opposite

They're definitely more "tainted" than those brands. I'd say public perception of ethics in tech brands, from most to least ethical, is:

Apple Microsoft Google Amazon Facebook

(whether or not those perceptions are well founded is another matter)

I've got good news for you. You can contribute to these projects (and put your contributions on your résumé) without having the Facebook taint. e.g.:

* https://github.com/facebook/react/pulls

It’s a lot easier when you’re getting paid for your time and are surrounded by other people working on the project.

Open source libraries like React should not be attributed to companies. It just so happened that Jordan Walke worked for FB when he wrote the library.

Its not like any of these companies specifically target creation of such tools as part of their business goals.

Those companies have teams that maintain them and they get tons of work done internally before they’re released. Microsoft has been great for Typescript just because of the brand that’s behind it and the teams that get paid to maintain it. React is the same way.