This would be hard to legally call extortion, since consumers are free to do business with who they please, and there is a strong history of boycott activity. Also if it were illegal, then many negotiating tactics become extortion. Is threatening to leave a company unless you get a raise now illegal extortion? Is demanding a lower cable bill or else you'll go to a competitor now illegal extortion?

I would consider these more ultimatums than extortion. Also extortion always includes quid pro quo, but not all quid pro quo is illegal. Context matters.