Netflix celebrated the 10-year anniversary of its streaming service by posting its largest quarterly rate of subscriber growth, adding just over 7m new subscribers in Q4 2016, smashing its own forecast for the period of 5.2m

5.12m of the new subscribers were for its international services, attributed to acceptance of its growing suite of English language original programs. But growth is just as likely related to the bolstering of overseas offerings with acquired programming, after launching worldwide with relatively small libraries

While re-establishing confidence after a period of doubt when missing targets in Q2, challenges await; most notably concerns around net neutrality, diversifying content genres, and the open question as to how effectively original programming will be able to carry the service

Streaming is now mainstream and we predict 113% growth in expenditure on subscriptions for 2015-18 in the top four markets (US, UK, Germany and France)

Free vs paid-for streaming is the central question for the music ecosystem: free yields fractions of pennies, making subscription the only credible business model

Market leader Spotify is facing competition from tech giants Amazon, Apple and Google, with deep pockets, for whom content is a pawn in a larger game