The implication is that it’s operating as a general purpose mobile botnet of sorts, and there is likely someone out there selling services on it. It seems like someone was using it for swatting (which is how they found it), and others may have been using it for spam and forum bots. The narrative that it was specifically a tool for attacking cellular infrastructure is a bit misleading. It might have been useful for that but as far as well know it was never used that way.