https://wccftech.com/bethesda-millions-playing-fallout-76/

We may not have official sales figures for Fallout 76, but Bethesda did state in their latest blog post that millions of players are currently adventuring in post-apocalyptic West Virginia. They also suggested the average playtime is quite high.

A huge thanks to all of you who have been playing Fallout 76 and embarking on this journey with us. Millions of you are playing the game and playing it a lot. We love hearing your stories, sharing your photos, and fighting alongside you in the quest to rebuild Appalachia.