Passive DNS data is a snapshot of what somebody was looking for and how long it has been active. The more data points you have, the more valuable that data becomes. The big thing passive DNS gives you is reputation where before you had none. Reputation is ephemeral. Its hard to gain and easy to lose. When you combine different data points, they form something better. It adds new element to being able to better understand reputation of incoming network traffic as well as identify risky domains & websites that enterprises should avoid.”]