Isn't the point of these CDNs that you only have to make the request once, and then it's cached forever? What does decentraleyes buy you?
- You request once _per CDN_. Common libraries are hosted on multiple CDNs and you may simply load them from multiple locations. For example jQuery is hosted by MaxCDN, Google, Microsoft, Cloudflare, jsdelivr.
- Some CDNs may be temporarily down. It happened for me already multiple times, including Google CDN and Cloudflare CDN.