[CodesInChaos]

There are other costs which can scale pretty high. The overpriced outgoing traffic is one. Certain APIs also charge per request or traffic. The S3 object storage is one example, databases like Firebase another. I believe most of the costs the OP incurred came from firebase and not the 1000 Cloud Run instances.

[rantwasp]

again. the comparison needs to be apples to apples.

it's true that outbound traffic does cost (and in theory if you do a lot of traffic), but the budget instances don't have that much bandwidth to start with. Also if you have a huge amount of traffic depending on what you do you might be better off with S3+cloudfront

[CodesInChaos]

Isn't outbound cloudfront traffic just as outrageously expensive as outbound EC2 traffic? My impression is that AWS is simply unaffordable when you have large amounts of traffic.