Earlier quoted context omitted.
Why would they? Cloudflare doesn't pay for egress and neither does AWS.
But their egress capacity is limited, not? We're talking about 1PB per month here. If every customer of them would be paying only 13 cents a month and pushing out 1PB per month, wouldn't they need to significantly upgrade their hardware and lose money in the process?
Which is never going to happen for legitimate use cases.
And Cloudflare has DDOS protection for ilegitimate ones.