“The avalanche of money generated by DVDs has transformed Hollywood, swinging profitability from the multiplex ticket window to the Wal-Mart checkout line. Income from the sale and rental of new movies, television series and classic films accounts for as much as 60% of a major studio’s profits, as DVDs have become a consumer electronics phenomenon. Yet even in a business that trumpets every nickel of box-office grosses, a title’s precise DVD profits remain one of the industry’s best-kept — and, increasingly, most divisive — secrets.”