"If we spend any freaking time educating the public about what they are and how to use them" The problem is that people will not learn a new technology to enga

"If we spend any freaking time educating the public about what they are and how to use them" The problem is that people will not learn a new technology to engage with an ad. If Facebook has been started with a ton brands and no people, and the advertisers kept putting 'hey like us on facebook!' in their ads, no one would have ever joined Facebook. Instead brands came to Facebook because that's what people were already using. If there was some utility to QR codes that got people using them outside of ads, then they might also work on ads. But right now, ads are basically the only place they appear, so no one is going to go through the effort to learn about them.