I said that the decision was about long-term health rather than short-term or midterm sales.
This website has some good sales archives.
https://comichron.com/blog/
September 2005 was JMS' lowest selling issue of
Amazing Spider-Man.
https://www.comichron.com/monthlycom...5/2005-09.html
Amazing Spider-Man #524 had an estimated 71,057 copies. It was in 25th place.
In contrast, it was selling in 9th place in July 2003 at an estimated 94,782 copies. In 8th place was another issue of Amazing Spider-Man with an estimated 95,074 copies.
https://www.comichron.com/monthlycom...3/2003-07.html
With sales arguments, the subtext (and often the text) is that if it wasn't for a particular decision the book would be better. If we're looking at the marriage era of the 90s that's more about the speculator boom than any good faith argument that we'd get those sales again on
Amazing Spider-Man if only they'd follow your advice.