Well, the shops were lacklusting so everyone decided "let's not go there". Most of those were in locations that would be convenient too, you didn't even need to go out of your way to go to a Target. People still decided not to shop there. That's pretty much voting with your wallet.
What other word would you use if a chunk of the population intentionally goes out of their way to walk to a store further away, just to not enter Target?
Target/Sears vanished in Canada because enough of us did vote with the wallets.
Facebook is just another company, with the difference that a lot of powerfull people now wants them gone.