> In general though ad tech is so primitive it is embarrassing It's not that it's primitive, it's that it's still run by humans. At least from what I saw while

> In general though ad tech is so primitive it is embarrassing It's not that it's primitive, it's that it's still run by humans. At least from what I saw while working in ad tech, targeting is very much a manual process. There's no algorithm deciding that you might be interested in magic crystals, there's a magic crystal seller targeting their ads at people in whatever demographic you're in. They decided that (for example) people ages 25-34, in certain income brackets, who are interested in fitness might also be interested in crystals, and Facebook was happy to take their $0.001/impression in exchange. To my knowledge most ads aren't targeted with a scheme like "hey targeting server, figure out who might like this kind of ad", or at least they weren't as of this time last year when I couldn't take working in the industry anymore.