> someone will buy a album because he have no idea about WTF it is

Based on the advertising I see in Nashville's Music Row, I'm pretty sure that actually is their strategy. The signs they put out usually have only the artist name as meaningful information, which is only helpful if you're already a fan (I guess it does get their name into your brain otherwise), and a QR code. I have no idea who scans the QR codes.

Some people have told me it's really meant for other people in the music industry, but it feels odd that they'd have to find out about music by random signs on the side of the road.