"Linda Lovelace became a spokesman for the anti-pornography movement," Porter noted. "She was adopted by the leading feminists, the most important of whom was Gloria Steinem."
This phase of Lovelace's life was to have been portrayed in the biopic. Demi Moore was cast to play Steinem, but she dropped out. The part then went to Sarah Jessica Parker, but her scenes were later cut from the film.
Lovelace later split with the feminists. "Linda felt that ultimately she was being used by them," Porter said.
Lovelace, who preferred in later years to go by her married name, Linda Marciano, died in 2002 as a result of a car crash. Traynor, her ex-husband, died a few months later of a heart attack.
Toward the end of Lovelace's life, her views on pornography and "Deep Throat" continued to evolve.
"She started attending porno conventions and started selling 'Deep Throat' memorabilia," Porter said. "It was almost a turnaround, a reversal for her."
As for her legacy, Flynt says Lovelace will always be an icon because "she was in the right place at the right time."
And that time, he said, was a turning point in the culture.
"At that point in our history the Supreme Court was trying to figure out how to deal with pornography," he told CNN.
"Suddenly 16 millimeter film was available and it wasn't long before Beta and VHS became available and you could move these movies directly into the homes. So you see a very budding industry there (in the '70s) that was no longer something that was in the seedy back room of some adult bookstore."
Porter also sees Lovelace as a historic figure.
"She did launch a billion dollar industry and she is the queen of it all -- a very unlikely queen, but history sometimes selects unusual people to put on thrones."