Walmart doesn’t technically make anything (not sure if it’s true to be honest) but they probably “enable” a lot of manufacturers to “make things” under their Great Value brand
The "logistics" of Spotify's business are mostly commoditized (storage, computer, app development), but certainly they have label relationships that would be hard for a new competitor to replicate. But the key part is that for whatever reason 226 million people have given Spotify their credit card number (or local analog) which makes them pretty important to record labels.
I could see Spotify doing the same thing. Particularly around live ticketing, merch, etc.