The author has described, which is pretty obvious for any enterprise that have used facebook advertising to gain followers. They do not convert, and even worse, they don't help spread the word. Unless you post a photo of lolCatz. But how exactly a serious profession like I am in (logistics) can keep posting lolz cats photos. ;)
As for Facebook for advertising your products i.e links to your product pages or website, the ROI is worse. But I keep using it however, because in my market, using Adwords is no more affordable, I roughly pay $0.03 for a Facebook ad click, while the same costs me $0.25 on adwords. That's why I had to give up on Adwords.
pardon my ignorance, but how this is different from non-branded chinese laptops. since those are non-branded i guess they don't have legal rights over it too.
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changes committed. http://i.imgur.com/YDG5Hoh.png