Tesla may have signed some kind of deal with Slacker that precludes them from installing it on a US car. That said I think Tesla would prefer to have it's codebase as simple as possible and therefore it makes sense to include Spotify everywhere.
This, so very much this. Supposedly at least Android Auto integration is actually pretty easy to do. Heck, next generation Hondas will have it.
im sure it is coming to the US soon
Please just support CarPlay and Android Auto. choices abound then.
Tesla went to market when the car was launched, Spotify was not the lowest bidder, so they went with Slacker in the US and Rdio in EU.
Rdio have gone bust, and Tesla have to make good on the functionality for the EU. (The new subscription on EU cars certainly won't have been free!)
IOW it's a tactical choice forced upon them not a strategic one. One thing I do know is Tesla are pretty hot on cost control, and this is sunk cost. MAYBE new cars will come with Spotify, but upgrading the fleet is a cost Tesla are under no obligation to bear.