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They told me the same old crap that I always hear. "please improve your CTR, remove keywords with low CTR & place them in a different adgroup, etc." - Things that I have already DID.
I called YSM also today about a problem that was similar - except they actually cared about it. They told me they were going to get to the bottom of it. They actually spoke to me like I was an adult and not a kid who knows nothing about business.
Don't get me wrong, I love Google. I get incredible amounts of traffic through them. But it don't seem like they care about their advertisers, nearly as much as they used to.
I guess the only thing that would force them to actually care about their advertisers more is some strong competition.