Of course they also sell access to new customers. I'm not saying they don't. But they also sell access to your existing customers, both to you and your competi

Of course they also sell access to new customers. I'm not saying they don't. But they also sell access to your existing customers, both to you and your competitors. That's what companies don't understand, and I'm sure marketers would be a bit more careful with the data they share with tech companies if they understood that.