Regarding #4, do you know how common it is to spend over $200k per month. If it is a rare use case I would not be surprised if those companies are making a sub

Regarding #4, do you know how common it is to spend over $200k per month. If it is a rare use case I would not be surprised if those companies are making a sub-optimal decision. In my anecdotal experience, whenever we considered that order of magnitude of spend on AWS we ended up building our own infrastructure.