I was on a business call with someone from AWS on a different topic, and it was pretty darn clear they opened up some sort of Account page that discussed our (limited) AWS usage, and were trying to infer a bunch about our business from that. It doesn't even really matter how deep that data goes - even just month-over-month billing #'s or something like compute/bandwidth consumption is super telling.

We mostly only do CI type stuff there, so that didn't work so well for them, but if most of our revenue & operational use was through AWS, you bet I'd be worried about what they could infer.