If you bothered to read the article, you would know the answer to your question. All of those 1.59B users login to facebook at least once a month, which are rep

If you bothered to read the article, you would know the answer to your question. All of those 1.59B users login to facebook at least once a month, which are reported separetly from the Messenger users, who are 800M. Imagine how the rest of your musings sound.