Google may have optimised ad impressions, but they are far from optimising ad clicks: 1. Last year I saw ads for cat food even though I don't have a cat and Go

Google may have optimised ad impressions, but they are far from optimising ad clicks: 1. Last year I saw ads for cat food even though I don't have a cat and Google has access to my photo stream. 2. I searched for information on the new Pixel 2 phone, but Google continued to show me ads for it after I had bought it and was using it at the time. 3. I saw an ad for Android Pay, so I tried to sign up. But then Google told me my bank doesn't support Android pay. Fair enough, but why do they continue to advertise Android Pay to me? 4. On Apple's website I configured a new MacBook Pro and placed it in my shopping cart, but then had second thoughts and I didn't actually buy it for 6 months. In that time I didn't see a single Google ad for a MacBook Pro. On top of that, I don't think Google has actually optimised ad impressions. When I read a Forbes article I see ads like, "You won't believe what these celebrities look like now". When I read The Economist I see ads for milk processing plant equipment. With all the personal information Google has about me, why aren't these publications using AdSense?