> which would create an unsustainable situation at this scale.
Financial sustainability may have something to do with it, but I suspect the larger issue is that providing too much detail essentially trains malware authors to route around the company's defenses.
Imagine the Play Store as a castle which has both good townsfolk coming and going as well as being perpetually under siege by a malicious lord. Sometimes, the castle's defenses inadvertently prevent a townsperson from getting to market to sell their onions. When the townsperson is like, "Hey, I can't get in to sell my onions." it's helpful for the castle defenses to be like, "Well, we have the portcullis raised from 9am-11am on Tuesdays and the gatekeepers listen for your accent to decide if you're a local or an enemy."
But that's, like, exactly not what you want to say if the "townsperson" you're talking to is actually an enemy spy taking notes.