Is there statistics on number of downloads of jars? Probably there is some on CDN, but is there anything publicly available?

There is on a release page in clojars

Not sure how accurate it is tho

@dottedmag stats are available on the page for each project, and from the api: https://github.com/clojars/clojars-web/wiki/Data

it should be fairly accurate for requests that hit the server or the CDN. It's not a real indication of usage, though, since we don't know about stats from any caching proxies (nexus, archiva, etc)

Thank you.