Jean Hopfensperger looks at the "Save Darfur" Facebook campaign: Vast majority of 1 million members didn't do much beyond clicking "like".

"The 'Save Darfur' cause on Facebook drew more than 1 million members between 2007 and 2010, drawing attention to the globally condemned human rights atrocities there. But beyond publicly supporting one of Facebook’s most well-known causes, what else did those members do? Not a whole lot — at least on Facebook, according to a recent study published in the journal Sociological Science. A full 99.76 percent of members never donated money on Facebook; 72 percent didn’t recruit friends or family to the cause, the study found." -- Jean Hopfensperger, the Minneapolis Star-Tribune