Streaming has killed a lot of the concern with illegal downloads. Most people who were downloading music were doing it because of the aggregated expense of buying albums they liked, and the convenience. A large percentage of those people are subscribed to a streaming service.
I think they will make it available to Apple Music and Spotify pretty quickly. They get nothing out of keeping it off there - it will be out in the wild, and people will pirate it if they cant find it elsewhere. That and the Album Sales Equivalent units give them a notional sale for every 1000 streams, so they would want it up there soon.