This would be fine for an automated system that could schedule requests or could fail, wait 30min, and try again. But it would be unusable by a human working interactively. You would constantly get complaints and monitor warnings that your "system is down".

I don't mind services that cut price dramatically in exchange for only supporting some (not all) use cases. That can be a very attractive offer, but does Backblaze explicitly position B2 for non-interactive use cases?