Marvel subscription offer, highlighting X-Men (Marvel, 1991 series) #107 (December 2000).
Between pages 10-11 of story.
Letters from: Joe Maiz, Chris Gaida, Heath McKnight, Trifunkle, goku306, Rodney Merseyside, Owen Thomas, Ronnie Dingman, Jason Wages and James McGee, Cats, Bruno Rey, and Jeff Stoltman.
On last interior page.