I guess it comes down to a difference in acceptability of intrusive advertising. Personally, I am absolutely disgusted when adverts are tailored towards me (especially since I don't see them most of the time with Adblock).

Seeing tailored advertisements brings me a feeling of despair, in the sense that your personal privacy is being exchanged for money. It only serves as a sad reminder that you must actively fight to protect it, and that we, as consumers, are failing at it right now.