That shows quarterly revenue not user activity in the US? In my orbit there is nearly 0 Facebook usage outside of a few boomers but instagram seems very popular.
"In my orbit" there 100% of the people play racquetball which means there are roughly 350 million players in the USA - hence it is the most popular sport on the planet and owner of my local team is richer than all NFL owners combined /s :)
Also see https://www.statista.com/statistics/408971/number-of-us-face... just for kicks :)
So you’re going to ignore publicly available information based on your anecdote?