Yes, Statsheet was denied putting 345 apps in the store for each college basketball team. If we are only allowed to have one app, then the user could choose which team is theirs, and then the front Icon would change to represent their team.
To OP of this thread: It was another idle comment. The crux of the request was in boldface.
A tighter implementation would be a limited amount over overlay that was configurable -- like the alert # but with more control. The important point being that the underlying icon that I scan for still being available.
MacOS uses this in a number of places to identify download, symlinks and the like.