"Gnarls Barkley track Crazy has become the first song to top the hit parade without a record being sold. The duo's melting pot brand of paranoid soul-pop hip-hop dance-slop shifted 31,000 legal downloads last week, and was crowned top of the pops by the Official UK Chart Company on Sunday. The CD hits shops today."
Source: The Register.
Another example of pure online content because the product is digital, the process is online and the content is unbundled (Loebbecke, 1999).