I thought it was in-game, but looking at https://store.steampowered.com/stats/ https://store.steampowered.com/stats/ I see the sum of the individual max daily c

I thought it was in-game, but looking at https://store.steampowered.com/stats/ https://store.steampowered.com/stats/ I see the sum of the individual max daily counts for top games is ~6M. So unless there is an extremely long tail, that must just be people who are signed in with an Active state.