The Rise and Fall of Everest (the App)
Product Hunt

I’m not familiar with the app, but it seems like $90–100k/mo is quite a burn rate for a 4 person team. (I’m an accountant, I like seeing the numbers.) You didn’t mention plans for revenue at all in the postmortem, perhaps that is a telling sign? This seems like something that could have been bootstrapped early to see if there was truly a need for it, like CWDZ mentioned.