The only reason I ask is I read somewhere or made up the fact that Google can't tell that AOL people are UK people and shows the US results?
So did I make that up during my sleep?
TIA
Ben.
If your intended audience is only UK I'd be inclined to only show to the UK. AOL will show your ads no problem, if you include the US the relevancy will be less, and so will the CTR, you ould well find yourself below 1% anyway, so in trying to show your ad to AOL users, you could be barring yourself from their view anyway (if it was an issue).
Hope that helps.