Unfortunately, we seem to have come to the point where the logical extension of making violence an all-ages-friendly subject, means that death in comic books is no longer shocking, it is boring.
In our current social climate, the one high impact event that it is acceptable to use as children’s entertainment, is violence. The most extreme outcome of violence is death, therefore when it came to creating some high-impact events in Ultimate Spider-Man; first his uncle was killed off, then his father was put in a coma, and now his mother has been killed off. In less than 22 issues poor Miles Morales is finding out that the price of being a young superhero published by a mainstream company is death all around him.
Outside of comic books themselves, there is very little advertising for comic books, online or on television. Targeting non-comic book readers could be effective, but are the corporations who own comic book publishers really trying to sell comic books?