There are lots. Many b2b businesses do not entertain Facebook at all. Those that do generate very little benefit from it.
I only know this because I'm in the marketing industry.
Of course, Facebook is incredibly useful if your customer segments demand it, and there are many, you're right, but...
Not all businesses need Facebook. It depends upon the customers you are targeting. Even then, it's possible to do business without it.
Personally, I'd rather not give my data to Zuckerberg for his personal gain. I'd like an open internet rather than a walled garden (or hell which is what it...
Does this mean there may have been many thousands of people caring for me at some point, and I never knew? I'm touched. Thank you Mr Zuckerberg for creating such willing lemmings.