The population adjustment procedure, of course, only works if it is “popularity” that you are interested in. As it stands, that word isn’t used in the map title, so for me at least, I viewed the map as being a more straightforward “where did Springsteen tour”…which would not have to be adjusted for population. Plus, we all know venues aren’t booked solely (if much at all) on fan-base locales and more to do with population centers, venues, etc. These are small items compared to the overall map’s aesthetic design, however.