We estimate that UK online ad spend grew by 12.3% this year, with growth concentrated almost exclusively in mobile search and social in-feed advertising (particularly video), and mostly incremental to overall ad spend

Even after payments to publishers and distributors, Google and Facebook captured 80% of all net new spend in the market, and 96% of it flowed through their platforms

Despite improving standardisation and disclosure, the outstanding issues around measurement, the ad-tech supply chain, and particularly the obscure and growing Google/Facebook/Amazon segment, lead us to identify a large portion of digital advertising as a “grey market”: difficult to get a handle on, with uncertain beneficiaries and slippery definitions

Digital advertising in the UK has been a phenomenal success story, but a concentrated one, such that many online media companies have not found a sustainable model

User payments are growing, but are currently focused on large, expensive bundles: Spotify, Netflix, the New York Times. This implements a hard division between free and paid and limits the potential audience

Micropayments and microsubscriptions are alternative models which content owners in certain media can use to address more types of demand. Multiple obstacles remain but for many companies the need to experiment has become critical

For the second consecutive year, the global recorded music industry body IFPI reported rising trade revenues, growing 5.9% to reach $15.6 billion in 2016

Our forecasts supplement IFPI’s trade revenue data with richer national-level consumer expenditure data from local bodies in core markets, and project CAGR of 2.3% to 2021, tapering off as streaming approaches maturity

This fairly modest topline growth for global recorded music streaming trade revenues is the product of our judgement that the marketplace remains awash with free music. Streaming trade revenue growth could be higher still if the industry finds a solution to piracy through technological or regulatory means, obviating the need for the ad-funded compromise

The “fair return” to US music publishers and songwriters for rights used by interactive streaming services will be decided in 2017 by the Copyright Royalty Board (CRB)

Rights owners want to switch to a fixed per-stream or per-user rate on all tiers, arguing music has an inherent value. Apple is asking for a much lower per-stream rate

Amazon, Google, Spotify and Pandora warn of disruption to free and ad-supported tiers if the revenue-share tariff is not rolled over, and the CRB could side with them

As Spotify wavers around the breakeven point, the deal with UMG is good news for royalty costs and thus for the likely advent of the IPO rumoured for autumn 2017

Royalty costs will reduce if Spotify reaches the subscriber growth targets that have been agreed – these have not been disclosed, so are hard to track

Question marks persist over whether a two-week optional windowing of new releases on the premium tier will significantly drive upgrades from the free tier

Amazon’s marketing services bring in a growing stream of direct, high-margin revenue, but their main role is still in supporting vendor partnerships

Amazon uses customer profile data to profit from its own media and that of others, illustrating the value of a direct customer relationship in online advertising

In the future, Amazon’s moves into video content and voice interfaces are likely to significantly expand ad inventory, but maintaining the trust of shoppers is not straightforward

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