I understand and agree with the suggestion of putting a CDN, but it's somewhat ironic to suggest the use of Cloudflare when that very same company is advocating for the DRM-for-webpages scheme.
Is it not a fair to assume that Cloudflare, as a company who have made a name for themselves selling various DDoS protection services, realize they're in an arms race with the old school way of handling these problems are are pursuing more advanced solutions before the current techniques are entirely useless?
It would be easy to point to the irony of saying "instead of supporting Cloudflare's proposals for PATs, use their CDN product for brute force protection" but on the other hand, they employ a lot of experts in this space and might see the writing on the wall in an increasingly adversarial public internet.
This is a good question, but if you look at it closely, Cloudflare seems to be the only company advocating for attestation schemes for the web.
It’s almost as if the conspiracy theory of Cloudflare acting as an arm of the US government and helping in the centralization of the internet is actually true.