[boredguy8]

I'd say "entertainment" is a service. Although entertainment can be a distraction, it's a) not necessarily a distraction; b) a component of being entertainment. Purely (or at least mainly) being a distraction isn't a service. And it's hard to think of most "social networks" as much of anything more than a distraction.

Really, of the major social networks, I can't think of one that does anything that's not done better somewhere else. And, at least so far, no social networking site has combined those services in a synergistic way.