That boycott had a demand attached, to prevent the sinking of the Brent Spar buoy. Effectively "unlimited" boycott until Shell gave into the demand.

This and the last no shop Friday thing seem mostly pointless. I mean fuck Amazon for sure but shouldn't there be some goal? "Boycott Amazon until X, Y, and Z" not "No buy from Amazon for a week but then we'll be back so no worries!"