Can you cite an actual example of a FAANG company using X for Y that is also primarily attributable to a single developer? That is, someone who can say "uses my X"?
Not a community-developed project with a lot of contributors, but a software that would realistically qualify as being mostly attributable to one person?
Redis is an easy example, but the author of that doesn't need to say "Netflix uses my X" because the software is popular by itself. AI being trained on Redis code hasn't done anything to diminish that, as far as I can tell.
recognition for the authors, which can lead to all sorts of opportunities. "netflix uses my X for their Y, worldwide" opens doors.