Earlier quoted context omitted.
Both numbers are entirely ludicrous - highly skilled people are certainly quite valuable. But it's insane that these companies aren't just training up more internally. The 50x developer is a pervasive myth in our industry and it's one that needs to be put to rest.
50x devs are not a myth. In any case the talent is very scarce in AI/ML, the one able to push through good ideas so prices are going to be high for years.
As for your various anecdotes later, I offer the counter observation that nobody is going around talking about 50x lottery winners, despite the lifetime earnings on lotteries also showing very wide spread:. Clearly observing a big spread in outcome is insufficient evidence for concluding the spread is due to factors inherent to the participants.