[friendlydog]

Does it count people who have messenger but never open it, but their device is signed it? It is cramware on a lot of android phones.

[erehweb]

https://backlinko.com/facebook-users claims "Official Daily active users (DAUs) definition: Daily active users or DAUs is defined as a registered and logged-in user to Facebook who visits the site through a mobile device application or web browser on any given day."

So according to that, no.