netmeg - 2:43 pm on Apr 28, 2010 (gmt 0)
We can't. You can beat and beat and beat your head against the wall, and it will make no difference. You will never know.
I've been thinking my CTR has dropped horribly too, but yesterday I compared Jan 1 - April 26 2009 to Jan 1 - April 26 2010, and it's actually UP. Who knew. And I don't have any thing blocked or disallowed except a handful of sites I just don't like.
I don't like the ads that follow you around because I think they're creepy, but I don't (so far) see any reason to think they're costing me money.