The boilerplate they were cutting and pasting as a response to many people's complaints said:
"I am copying our Senior Art Buyer, Peter Lindsay, who can discuss with you the opportunities available to work with Art.com directly. As a first step in developing that relationship, we will be removing your poster from our websites effective immediately."
Which implies they're interested in working with every person who complained. Which I can only assume is not true, and that not everyone would receive a follow-up. I expressly asked to not be contacted again.
I never contacted them directly, I just commented via facebook on my poster they were trying to sell, telling folks what they were doing and letting them know to buy the book or the art directly from the artist. Never received any contact from them, but they did take mine down as I think they did everyone else.