So you think that Spotify
et al should just create a free app but then create a link to sign up on their own website? So essentially just using the App Store as free advertising?
"I don't want to actually
sell my products in your store because I don't want you to make a profit from my product...but what I
am happy to do is put up a big advert in your storefront window directing potential buyers to my own store across the street...that OK? Cool..."
Sounds very much like "ambush marketing" to me in scope. In
this article it explains what "ambush marketing" is:
"Ambush marketing is an attempt by an unauthorised party, through deliberate marketing activity, to take advantage of the high media profile of an event, team or individual (often of a sporting nature) at the expense of another company's (usually a rival's) official association with them, without paying any licence or sponsorship fees.
Ambush marketing is clearly a very effective marketing tool for brand owners, as it attracts consumers at the expense of competitors, and at little cost to the brand owner. However, it also has damaging effects, not only for those ambushed competitors, but also for the integrity of the event, team or individual concerned and their potential to attract future sponsors."
Now replace "event, team or individual" with "brand" and that's what this amounts to. Spotify (or Netflix etc.) wanting to take advantage of the "high profile" of the App Store without paying any fees. And, as per the above definition, it "attracts consumers at the expense of competitors, and at little cost to the brand owner" (the "brand owner" being Spotify in this case).
While "ambush marketing" isn't illegal in the UK, and while Spotify re-directing users out of the App Store to sign up on its own website wouldn't be "ambush marketing" in the strictest sense, it is parallel in terms of its mechanism and goals. I know that they can't currently do this but if the EU does try to enforce Apple to allow such links then I personally believe that would be the EU actually
implementing anti-competitive rules.
Spotify is free to compete; free to compete on price, free to compete on service and free to compete on offering. If Apple Music is taking customers away from Spotify then that isn't purely based on price. And even if it were, Spotify are free to drop their price if they so choose. Just as they are free to vacate the App Store completely.