Yahoo is total crap.
I recently succumbed to the Nectar entreaties to install the Nectar tool bar and 'earn' points for searches. Very silly of me.
My normal Google page disappeared leaving me with a vast page of nasty advertising, and the toolbar was now going to Yahoo. I played with it a little, not really thinking, then later I needed to find a local timber merchant (or Wickes or B&Q) for some work I am doing on my room.
I was amazed that following the links from that page led me to a couple of timber merchants in far off NE London, and nothing else! I live in Deptford, SE London!!!
I was really unhappy that Yahoo do not offer a reasonable choice of places and exclude anything I can easily find through Google.
Naturally I trashed all signs of Yahoo, and the Nectar rubbish.
No wonder they are losing out with their stupidly restricted policy.