Comment by troupo

> Effective ads absolutely require knowing more about the user than the context on the page

That's what the tracking industry keeps telling you with zero evidence it's true.

And then there are studies like this one: https://www.sciencedirect.com/science/article/pii/S016781162 which say that targeted ads need to be 100% to 700% more effective to be as profitable as non-targeted ads