In the late 1960s the US comic book industry was confronted with a huge dilemma: All comic books sold at public newsstands had to undergo censorship and needed the approval of the Comic's Code on their cover. During these times, magazines represented the big exception from the rule - and boomed.
Other than comic books, magazines were mostly out of reach of the "Code". EC had alreday startet MAD Magazine in 1952 and thus prevented censorship. Others followed and used the breach for their art: Like John Warren, who published Creepy Magazine in 1964 and recruited a number of former EC artists like Frank Frazetta, Reed Crandall, and Al Williamson. He also persuaded great authors and writers like Archie Goodwin to work for his new trademark and today we hugely owe John Warren for furthering the success and revival of former EC-horror. A few years later Eerie (early 1966 to February 1983) and Vampirella (from Sep 1969) followed in the footsteps of Creepy-Magazine.
Another notable fact: Not only did Warren secure the existence of high quailty horror comics on the US market, he also supported a number of hispanic atists and therefor helped established a broad artistic diversity in comic art.