> You pay 1¢ (or less!) for every Gigabyte of data accelerated over our cloud network.
doesn't seem clear cut as they bundle it in a subscription packages, but at this volume you'd surely need their enterprise package (10Tb+), which you'd expect to get 0.01 or less
You could try that instead of the "CDN" service
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Alternatively, try the "cheap" CDN services like Bunny or Beluga, which have packages for high volume like 0.005c/gb
Cloudflare is not really selling a CDN, but all the "smart" services on top of it.
That's why you don't have as much control (like blocking IP/Geos without Enterprise), or run into issues for breaking their ToS.