They should have made a deadline for 1,000 hour hats; Example:

News: February 20, 2012: We have implemented a deadline for guilds to receive the 1,000 hour fort hat. All guilds aiming to receive a 1,000 hour hat must obtain 1,000 fort hours by June 20th, 2011 to receive their hat. All guilds who obtain 1,000 hours after this deadline will receive a more generic item, instead.