There's been a huge amount of progress in machine learning in the last five years, largely due to breakthroughs in deep learning. If you're wealthy and you've been visiting many car websites recently, then car vendors might be willing to outbid everyone to show you car ads, because they stand to make much more money selling you a car then a shoe company would selling you shoes. You'll be interested to know that the web advertisement world is already set up so that the information ad providers like Cloud7 receive about you is in part supplied by outfits referred to as third party data providers.