That it may well be, but it definitely falls on Cloudflare that they were able to take advantage of this for so long, and that the “unlimited traffic” was displayed as one of the perks in the Business plan (although I haven’t seen any evidence that that was listed). The decision to charge $10k a month would seem fairer if they weren’t insanely aggressive, and claimed there were violations of ToS where there don’t seem to be any.