The book on Ed was he had a deal with Jim South -- when World Modeling was basically the only game in town -- to get the fresh-off-the-bus girls steered to him first. They would get paid about twice the standard rate to pop their video cherry with Ed.
Many girls clicked their heels together and did a Dorothy Gale to get back to Kansas after being mounted by that homunculus; so he has a bunch of girls who only fucked him in their "career". Others who have stronger constitutions go on to fuck other meat puppets and become porn stars.
Ed's genius is/was that he fucks practically ever new girl in the biz so he has a deep collection of whores in his catalog. If a whore has any sort of following from the sweaty fanbois and because fanbois need every scene of their obsession in their collection, they will have to get their obsession's Dirty Debutante episode. Ed's catalog is very strong for that reason.
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"I'm a minor character in my own story", Steve Coogan as Tony Wilson in 24 Hour Party People