You're assuming their business plan included only the one round of funding. I'm assuming they were planning extra rounds or the VCs believed they would need extra rounds.
If they went up to, say, a Series B at 10M and a Series C at 20M, which are reasonably conservative multiples, they are at ~36.5M, so looking for a ~400M exit. It's not hard to need that ~1B exit if your business plan is "everyone in the world using my product," and it appears this is what Everpix were aiming for.
I hear what you are saying. But i still feel like there is some mixture of thought that should let these guys take a shot at a 50 to 100m exit, without (on the one hand) tripping over 35k aws bill; and on the other blowing through 50-100m of invested capital. because clearly, if the team is pitching those are the only options, its gonna make people nervous. but now it seems the mirror is pointing back at the guys and not at the VCs...
If they went up to, say, a Series B at 10M and a Series C at 20M, which are reasonably conservative multiples, they are at ~36.5M, so looking for a ~400M exit. It's not hard to need that ~1B exit if your business plan is "everyone in the world using my product," and it appears this is what Everpix were aiming for.