If I have full ownership of a digital good, then I have the ability to copy it.
Any limitation of my ability to copy requiring removing some control from the owner and escrowing it with another party (e.g. DRM).
As much as I hate to say it, allowing digital good resale is a good use for a blockchain: uniquely identifying an instance and then keeping a decentralized ledger of who owns it at any time.
However, there would still need to be a carrot to make this system attractive.
If there isn't, then why wouldn't people just create infinite copies off-ledger and ignore it?
And without any viable digital goods ownership system, who wouldn't companies default to the current model of only offering licenses / subscriptions?