tl;dr; Poor people are irresponsible and waste time on facebook, maybe rich people do something different. The title suggests a digital divide, but the body only discusses one side of it. Statistics are hinted at but not given.
I wouldn't be surprised if that study was written from end to beginning. That's the kind of thing that usually gets picked up by the media. They comb through thousands of B.S sociology studies and report on the ones that represents an amusing, interesting, or politically useful narrative.
Yes, a pretty awful article about an (IMHO) important problem.
Article seems to be about user addiction, yet it skirts over the topic for some reason.