I use an adblocker and despise most ads with a burning hatred, but the absolutist position of "never helpful" isn't right. My example: A game I've been wanting to buy for a while recently went on sale on Steam. I saw an ad when I opened Steam. I bought the game for the low price, and it is now one of my favorite games I've ever played (Burnout Paradise City - highly recommend, but wait for a sale)