alt Hacker NewsIt's right in the article, there were 40bn of disclosed costs. It's still a good return, it pays for itself in 18 months, but if you build and rent data centres, then that's your business, and you're not likely to 100x in 3 years, which is the wild projection behind their valuation.
Also moves spend from capex to opex for your competitors - their access to your GPUs so don't have to wait to buy so many of their own, and I'm going to take a stab that those puppies are going to depreciate hard.
But better to make some money with it while trying to catch up than none money hoping you _can_ catch up.