But few employers will navigate to a site other than your actual GitHub profile. If a third-party scrapes that data from commit logs, the employer has to trust the third party and also do the extra work of going to their site in addition to your provided profile, and that's far less likely.
Hosting the stats directly on someone's profile landing page at GitHub is incredibly, hugely different and more problematic than if someone else aggregates it later and hosts it elsewhere.
