Because you don't have to be alive to make money.
Elvis Presley
They didn’t call him the King for nothing. Elvis Presley may be long time gone, but just last year he made $55 million for the Graceland exhibition and Elvis Presley Forever album.
Bettie Page
The godmother of pin-up’s net worth is around $20 million and in 2008, the year she died, she made $6 million in revenues.
Steve McQueen
The 70s action star earns around $9 million a year thanks to his appearances in public adverts, even after his death.