@nogweii @Edent There are some bigger sites that use Libravatar, but we‘re not bragging with it, not do we disclose that information. We‘re a bunch of people running the site for non-profite with a privacy-first approach (probably way better than Gravatar!).
The only site that I can talk about is Fedora and it‘s whole ecosystem that has Libravatar integrated even with OpenID (also used for lookup).
And I‘m open for suggestions about additional features!