Seems like a useful service, but there is something quite ironic about having a video titled "The Risks of a Consolidating Internet" [1] hosted by Cloudflare.
[1] https://cloudflare.tv/best-of/478d779664ac0f7ae7fe21064bdcb4...
[1] https://cloudflare.tv/best-of/478d779664ac0f7ae7fe21064bdcb4...
(Probably the only issue I currently hit doing this is that my ISP forbids me to use well-known ports, and Cloudflare will neither provide free CDN on a non-standard port, nor allow me to do any sort of redirecting to another port using their free service.)