My customer has fb fanpage with 3000 real fans, gathered over 2 years. Active like and share campaigns running every month. Main kw in fb URL. No prior likbuilding. 2 months ago I bought 180 edu backlinks from fiverr to the main website and fb fanpage and almost overnight the fanpage is gone from #1. No serps at all. Not even with "facebook.com/pageurl" 180 edu backlinks can do that !? not nice.