"He revoked access to Penney’s sales data for all but the top executives. But that took away valuable information: the buyer for, say, men’s big and tall could not see how women’s plus size was performing."
I'd rather risk having my competitors occasionally get some of my data, than risk not sharing data freely within my own team.
The competition is likely already getting those signals anyway, and the larger your organization, the more likely that you've got many internal blind spots that you really need to address.
Can you change one of these beasts? I maybe just attempt to rebrand them?