One year
Netflix uses piracy stats to choose its programming: Senior executives from Netflix have explained their method for choosing which programs to license for the service: they buy the rights to the most-pirated shows in each territory, because that's where the demand is.
Five years
Author John Scalzi "On The Asking of Favors From Established Writers": John Scalzi's scalding and funny diatribe about why he doesn't give favors to unestablished writers applies to more than just writers.
Ten years
Bubblegum Alley: For forty years, people passing through this narrow alley in San Luis Obispo, California have stuck their chewing gum on the walls.