Is There a New Manifestation of Something That's Very Old?

Amazon is one of many companies using cross-site advertising to target customers. The company has been doing this for years, and it's not just Amazon that wants to do the same thing. If you've got an app that hundreds of millions of people look at, you can put an ad there. Even if you don't think of yourself as a media company,. And so that's what's going on with Uber, for example.