I call it misleading.
Two Billion real users isn't believable.
The World's population is 7 billion. A proportion are too young or sick to use the Internet or Facebook.
The approximate Internet users is 3.7M. But this almost certainly includes people appearing multiple times (phone, tablet, laptop. In the west many better off have more than one smart phone, penetration over 120% in many countries).
China (731 million users) doesn't have Facebook, so 3Million, not 3.7M.
How many Facebook accounts are sockpuppets (I have three accounts so as to validly, honestly and morally separate completely different activities)? How many Facebook accounts are bots selling stuff. The coffee bean weight loss scam with millions of automated accounts is no isolated incident.
Facebook isn't independently audited and has more than once inflated figures.
Their business is NOT providing a social media platform or news or information. It's selling adverts, so they have no incentive to remove fake accounts, bots, fake likes etc. Those increase revenue.
So 75% of possible Internet "users"? I doubt it. No doubt too they count all accounts, irrespective of activity, even if their claim is remotely real.
Much of the criticism of abusive corporate behaviour also applies to Google. They are both the biggest parasites on the Internet (there are others) as between them they appear to have 98% of Internet advertising revenue.
People are conned into using Facebook when email would be better. Or their own blog, especially companies. Shame on large companies that promote Twitter & Facebook, yet often have a decent web infrastructure, or other bushiness that use Facebook instead of $100 a year hosting.