You might want to see https://github.com/jsdelivr/libgrabber; it's a cool tool jsDelivr folks are building to keep their repo automatically updated. Sure, there's no monetary incentive but those guys are genuinely passionate about making the web faster and better for all.
CDNJS does not belong to Cloudflare, they are simply a sponsor. IMO there's no reason to use CDNJS if one can use jsDelivr which offers a multi-CDN approach and real-time routing decisions with Cedexis.
There's also a very cool public CDN API https://github.com/jsdelivr/api