FAANG-controlled “open source” projects aren’t really Open Source - they release the code licensed under Open Source license, but without most of its fundamental advantages.
Kinda pointless to speak in such broad strokes because people will have a range of experiences based on the specificities of the projects they interact with.
this is not a always true and general rule, probably I agree if you say that they do open source only to grow reputation between dev but not every OSS project are fake OSS -> VSCode in my opinion is one of these example