Comment Google has no clue about social spam. (Score 5, Informative) 67
Back in 2011, I wrote a paper, "Social is bad for search, and search is bad for social" There, I described the social spam ecosystem, from the SEO firms to the phony account generators to the proxy sellers. I named some of the big social spammers.
Most of the same companies are still social spamming. In the paper, I mentioned "Google Plus1 Supply". They're still active. They're still selling "+1"s. Their site looks almost exactly the same as in 2011. But their prices have gone down, and their number of fake "+1"s sold has increased from 4 million to 33 million. BuyPlus1Fans.com is still up.
Where do they get the accounts? BulkAccounts.com is still up, just like they were two years ago. They're an outsourcing firm, using low wage labor to create new accounts. For an automated approach, there's JetBots, which claims to be able to create 250,000 new accounts per day on a fast connection. They offer "CAPTCHA Bypasser", which runs CAPTCHA's through OCR, and when that doesn't work, ships them to an outsourcing firm for manual recognition. Once the account is established, their "voter bots" add any desired number of stars to reviewed items.
Facebook is no better. BulkLikes.com is still up. In 2011, they charged $260 for 500 Facebook fans. Now, it's only $70 for 1000 fans.
Old-style link spamming was expensive - spammers had to set up content farms, run servers, refresh them with interesting content, and worry about their farm being blacklisted. Social spamming is cheap - Google, Facebook, and Yelp host the spam for free. Yelp tries to push back against social spam; they've sued some spammers. But Google and Facebook don't seem to be trying at all. The fact that the big spammers of two years ago are still big spammers clearly show this.