I found this commentary on 360-degree artist contracts, and other new strategies, in Fitch Ratings' press release about its ratings on Warner Music Group debt:

"While Fitch would expect margins to continue to improve, as digital makes up a greater percentage of total revenue (currently 15% of total revenue), Fitch believes WMG's new initiatives in emerging areas such as artist management, video content and ad sales will offset some of those gains over the short-term. Fitch believes WMG's push into video content and advertising sales is prudent as legitimate outlets for music video content continue to increase and business models for monetizing such content continue to gain traction. Risks related to increases in up-front royalty payments to artists in management 360-degree relationships is somewhat mitigated by Fitch's belief that recording companies such as WMG will have significant leverage regarding deal terms with new artists. Given the limited number of major recording companies, Fitch does not believe there is additional risk related to A&R strategy in the evolving landscape of label and artist relationships."