Yup. It wasn’t DC that lost on the death of Superman. It was all the idiots who bought multiple copies—and I mean MANY, some people bought hundreds of copies, hoping to sell them later for big bucks. Problem is that they sold so many the Death of Superman comics are virtually worthless.
Wolverine is already established in Marvel storylines set in the future. So any death is going to be temporary. Or figurative.
Stores were stuck with a glut of "high priced" but worthless shiny books that no one was reading ("these are for resaale later!"). Quite a few doors closed up in the wake of that monopoly.