There are a lot of places in Europe where 1.5k$ is more than 50% of the total cost of an employee.
And the obvious question: what it's the cost of that revenue? Because it looks huge but ...
One could hire a competent developer here in Brazil for that amount. I know because my workplace has hired competent developers for that amount. You can even call them senior developers, but you can't get "non-startup seniors" with actual experience, those expect a bit more.
I just wanted to take their number at face value. It's not like it needs more real information to make AI a bubble.
Don't you forget about India and Latinamerica... No way I see companies paying that much for outsourced employees