Isn't this just standard targeted advertising? The back page of the book has ads for other books! The protein bar sets up a sample-stand in front of the health-

Isn't this just standard targeted advertising? The back page of the book has ads for other books! The protein bar sets up a sample-stand in front of the health-food store! Etc etc. You gotta advertise to get traction, and the best place to do that is where your users already are..