This is the only type of internet ad that has ever worked on me. They read-out a promo code unique to their channel that gave me a 10% off discount upon purchase. Not just that, but the channel got a kick-back for promoting relevant content, and the advertiser got data telling it exactly how effective money-spent on this channel was by virtue of the promo code.

No tracking of my habits was required, and all parties involved probably got detailed-enough feedback as to their campaign's effectiveness.