I've been approached to put adverts on my web site. Do you think I should? I'm thinking 'probably not' and guessing it would be a pointless and frustrating distraction to both you and me. But... I would get paid to do so (hurrah!) But probably not very much (booo!)
So they can sod off.
Screen inchage (is that a word?) is valuable enough as it is without all those ads cluttering it up and slowing page load times. Right?