The blog quotes DC artist Sheldon Moldoff as follows:
It was a question of trying to find something that sold, and if one issue came out and it happened to sell, then immediately they would follow that type of story. Now, it didn't neccessarily follow through that they were going to sell. Now, I know Jack Schiff, when he was the editor of Batman, he followed sales very well. When he found that a gorilla on covers sold, then you could be damn sure that in an issue or two you're going to have another gorilla story.Come help Craven Monkey the theatrical equivalent of this phenomenon – buy your tickets today! More monkeys in indie theater!