I don't know how they can justify 250 USD / month bill. let alone 1000 USD / month.
I can see why YC is interested in this issue, as I'm sure lots of startups are trying to stretch that runway.
Each of them are making a lot of decisions on the infra. and that combines with the crazy pricing models from the cloud providers was saving companies a lot of money.
Then, we saw how much time is saved when you catch it at this point vs after the fact. Basically avoiding a bunch of tech debt