1/2 of Twitter Users Follow 2 or More People

Perhaps the first thing that strikes you, looking at this graph, is its familiarity. As it turns out, when using Twitter, a relatively small number of users actually "follow" many other people. In fact, just about half of Twitter users follow two or more people.  About 10 percent of Twitter users follow 50 people or more, and an infinitesimal number follow more than 500 people.

That's basically the flip side of a graph you might also be familiar with, the number of followers a Twitter user has. As you would expect, it's the same graph: a very small number of Twitter entities get a disproportionately high number of followers.

Both of those graphs would be expected in a Pareto distribution, sometimes popularly known as the "80/20" rule.