We run our own infrastructure, sometimes with our own fincing (4), sometimes external (3). The cost is in tens of millions per year.

When I used to compare to aws, only egress at list price costs as much as my whole infra hosting. All of it.

I would be very interested to understand why netflix does not go 3/4 route. I would speculate that they get more return from putting money in optimising costs for creating original content, rather than cloud bill.