Spotify has joined the growing number of brands making marketing a personal experience, a concept we explored last week, by creating a special playlist to thank a user for her positive feedback on the site.

Spotify has joined the growing number of brands making marketing a personal experience, a concept we explored last week, by creating a special playlist to thank a user for her positive feedback on the site. The playlist contained a hidden message, with each title of the songs included spelling out a note of gratitude. (AdWeek)