Liz Pelly dissects Spotify's mood based ad business from a surveillance capitalism perspective. (see Shoshana Zuboff's book for more).
"This is because Spotify specifically wants to be seen as a mood-boosting platform. In Spotify for Brands blog posts, the company routinely emphasizes how its own platform distinguishes itself from other streams of digital content, particularly because it gives marketers a chance to reach users through a medium that is widely seen as a “positive enhancer”: a medium they turn to for “music to help them get through the less desirable moments in their day, improve the more positive ones and even discover new things about their personality,” says Spotify."
"In appealing to advertisers, Spotify also celebrates its position as a background experience and in particular how this benefits advertisers and brands. Jorge Espinel, who was Head of Global Business Development at Spotify for five years, once said in an interview: “We love to be a background experience. You’re competing for consumer attention. Everyone is fighting for the foreground. We have the ability to fight for the background. And really no one is there. You’re doing your email, you’re doing your social network, etcetera.” In other words, it is in advertisers’ best interests that Spotify stays a background experience."