Jim Shooter interview in that topic last year:
“And we’d experiment–Bill Sienkiewicz is a genius artist. Chris [Claremont] wanted to do the New Mutants together. Bill said, ‘I really want to go experimental, I know you want everything clear, but I want to try some stuff.’ I thought Sienkiewicz was a genius, Claremont–he’ll pull it together. I said go for it, swing for the fences, you’ll never hear from me that it’s not clear enough, and boy did they swing for the fences.
AiPT!: And now there’s a New Mutants movie coming out.
Shooter: Yeah and the stuff was fantastic. On the newstands where the readers tended to be younger–they didn’t get it at all. But this market, they loved it, sales shot up.”
http://www.adventuresinpoortaste.com/2017/11/19/interview-legendary-marvel-comics-editor-in-chief-jim-shooter-on-the-current-state-of-marvel-creator-incentives-and-more/