Huh. The landline telephone business has, for a long time now, been compromised by spammers and bots (telemarketing calls and robocalls). I canceled my land line about four years ago after going for three months without receiving a single call I wanted. It seems the commercial social networks are headed for the same fate. And, they're headed for hardnosed and unpleasant regulation by governments. They probably need t…
People have bought fake traffic, users and comments for that amount of time too. Often en mass with automated systems importing it from third parties like Yahoo Answers.
It's just that the commercial social networks are now the main target, and the scale of these operations has gone up accordingly.