[throwaway-aws9]

With AWS, there's always a catch. In this case, it's for 10M requests. In other words, you pay $15 for 10M requests of up to 5MB each.

[edit: looks like there's no overages but they may force you to flip to the next tier and seems like they will throttle you https://docs.aws.amazon.com/AmazonCloudFront/latest/Develope....]

[yellow_cobra]

You get visibility into your usage, and you're seeing if you're exceeding the usage. They recommend to use plans if your typical traffic is 'only' up to 50TB per month. Occasional spikes are fine from what I understand.