How did FAST fail so.. well, fast!?

I'm guess most of us here are bootstrapping indie-hackers, trying to build a great product on a tiny budget, right? .. so I'm also guessing you're as astonished as I am to learn that Fast is closing down, having burned through $125,000,000 building a checkout API. $125,000,000 💰 To put it into perspective, that's over 1,000x our £100k crowd round, raised to build OneSub and Charlie. A thousand times. 🤯 How do some startups burn through cash like this?.. Where on earth does all the money go??