It's not the quality of the code I'm concerned about. It's more a matter of principle, and the fact that every use of their software possibly contributes to their reputation and appeal to highly qualified developers.

Yep, participation is a form of advocacy.

> AFAIK the licenses are ok

What about that patent license noncompetition thing? That's cool? Or did that get pulled?

It's been changed.

https://code.facebook.com/posts/300798627056246/relicensing-...

It's only been changed for their most popular projects, though.

React may have changed to MIT but React-Native and other projects still use the BSD+Patents license.

EDIT: this apparently was fixed last month.

React Native has been updated to MIT too: https://github.com/facebook/react-native/blob/master/LICENSE

Actually now React Native uses the MIT license, this was changed in February: https://github.com/facebook/react-native/commit/26684cf3adf4...