I left Facebook in 2014, having had to rejoin because in that era, you had to have an account to get a job. Which is another topic but worth keeping in mind.
If I don’t know why I’m somewhere, I leave. Rave, website, bar … these are all the same questions, just with less external pressure because you aren’t the product in the other two situations.
I could swear Google wasn’t broadly a thing yet. The startup I worked at in 1999 had an elevator pitch for how we “could be the next Yahoo.” Not a great thing to aspire to in retrospect, but Google wasn’t on our radar.