Something to consider:
"Forget You," by Cee Lo Green, reached #2 had 5.3 million downloads.
Quote:A chart-topping single could once be counted on to drive big sales of full albums, which bring in greater royalties. But the “unbundling” of albums in the age of iTunes — the loss of album sales at $10 or $15 when consumers can buy a single song for about $1 — has contributed to a 58 percent reduction in album sales since 2000. Despite the success of “Forget You,” “The Lady Killer” has sold only about 450,000 copies in the United States. .
Quote:A recording contract for an act like Cee Lo would typically offer a net royalty of about 15 percent, according to several music executives. That means that for a $1.29 download from iTunes, after Apple takes its standard 30 percent fee, the artist would be paid 13 or 14 cents; for five million downloads, that amounts to about $650,000. As one of five writers of the song, Cee Lo would also make about $45,000 in publishing royalties on those downloads.
http://www.nytimes.com/2011/12/26/busine...wanted=all
TOTAL ALBUM SALES
2005: 619 million
2011: 331 million