I was trying to suggest that the data they are collecting is rather valuable. They don't have to exploit the data (I believe them when they say they won't), but if it were to "escape" then someone could certainly make use of it.
This, and because of this "goldmine" they will become a target for blackhats who will try to get their data. There are people who would pay in megadollars for that data (or even aggregate reports), so there's an incentive, and there's a market.
Exactly right. Sort of like BitCoin exchanges with hundreds or thousands of coins in a 'hot wallet'. It cannot help but attract those who would do anything for a few bucks.