Copybar cofounder here.

Thanks! Yeah, we're using the CDN to dynamically display your edited content.

When editing an element, we invalidate the cache on the CDN. It may take a minute or 2 to propagate.

Search engines these days execute Javascript so it can index this dynamic text. However we also have a backend integration solution (via a simple rest call) for people who would rather serve the content from their web servers directly.