I'm in highly politically active company (college) in a highly politically active area (Cambridge), and I've also only heard of the Chick-fil-A boycott. I don't use Facebook, though, so if people have only been spreading it over traditional social media and not word-of-mouth, I may not have heard of them.
Three of his examples were "socially conservative" boycotts, and one was a "socially progressive" boycott. So it's not all that surprising that you only heard of one (guess which) while going to college in Cambridge.