Why do the Grateful Dead keep getting bigger?

Despite the fact the original lineup disbanded decades ago, the Grateful Dead continue to get bigger and bigger. So, why is that?

John Mayer combines Grateful Dead's Dark Star with one of his hit

Grateful Dead Graphic T-Shirt

Through the years on the Dead's long, strange trip

Michael Doherty's Music Log: Grateful Dead: “Road Trips Vol. 4 No

Why Can't We Stop Quitting the Grateful Dead? - The New York Times

Albums That Should Exist: The Grateful Dead - Mindbender - Non

A long strange trip

Grateful Dead, and Big Brother & The Holding Company, 1967 (by

Holy - Lights - Track of the Day

Trying to get into the grateful dead found this chart, what's the

The National Announce Grateful Dead Tribute Album Featuring Wilco

50 Years Ago: Waylon Jennings & Grateful Dead's Legendary Stadium

Liquid Blue Unisex-Adult Grateful Dead One More Halloween Night T-Shirt : : Clothing, Shoes & Accessories

Rediscover The Grateful Dead's Eponymous Debut Album 'The Grateful