Wow that's.. tiny. I was also surprised to learn that Twitter has just 187M daily users, even smaller than Snap (249M), which in my mind was only an app used by American teenagers.
I don't know a single normal person that uses it on a daily basis. The fact that is has this many people is amazing to me.
Tweeted?
Scrolled through their timeline?
Read an embedded tweet on a news site?
Dismissed a mobile notification?
For a platform like Twitter (or Facebook for that matter) it seems relatively easy to game the numbers.