QuoteThe leading DRM digital download service, Apple's iTunes, has experienced a collapse in sales revenues this year according to analyst company Forrester Research. Secretive Apple doesn't break out revenues from iTunes, but Forrester conducted an analysis of credit card transactions over a 27-month period. And this year's numbers aren't good. While the iTunes service saw healthy growth for much of the period, since January the monthly revenue has fallen by 65 per cent, with the average transaction size falling 17 per cent. The previous spring's rebound wasn't repeated this year. And it isn't just Apple's problem. Nielsen Soundscan has grimmer news for prospective digital download services, indicating three consecutive quarters of flat or declining revenues for the sector as a whole.