I think it's certainly incorrect (having known lots of people on both sides of that number, there are far far more below). Another comment thread suggested that startup equity is being taken at face value, which might justify the number but is totally ridiculous
On the other hand, most LinkedIn jobs published last week (e.g. full time/hybrid in SF) seem to be much closer to 180K-200K.
That’s base compensation. They aren’t reporting equity, which is usually at least 1/3 to 1/2 total compensation.