I still don't how these ad networks extract their revenue from besides accidentally clicks or ad view bots. For all the power of targeted advertising they sure as hell do serve up ads that simply useless by design, like showing me GPU deals only after when they know that I'm already actively searching for them.
Um... that's how it is supposed to work.
Chalk that up for a win, for now. In the future, they'll be better able to "read our minds" and figure out advanced patterns. How long do you go between GPU upgrades? Hit that point in the calendar, the ad networks will start serving you up some juicy ads.
For now, searches trigger targeted ads. If you haven't searched for something in a long while, it's unlikely you'll get a targeted ad. For the current algorithms, it doesn't make any financial sense. But if you are currently searching, the algorithms are hoping that you are still searching when they display targeted ads. If you're like me, you might begin your research months before you feel comfortable making a purchase. Oh, the ads you'll see!