webcentric - 1:52 am on Aug 14, 2013 (gmt 0)
@explorador Thanks for putting a name to my observation. A quick search of the board turned up this thread and many others which I find enlightening.
Don't know what camp I fall in but my experience lately at least got me thinking about it. Feels like some kind of capping mechanism but in an environment with so many variables (many of which are unknown) I don't know how you'd prove it one way or another. Just feels like one of those laws of the universe at the moment that can't be explained and can't be broken. As for terminology, I think "revenue throttling" would more accurately describe what I'm experiencing than capping. Like a mixture of fuel and oxygen, CTR and CPC just keep mixing at different rates to arrive as some seemingly predetermined level of efficiency (regardless of increased traffic). Of course, that's just a handful of variables so not very scientific. Randomness will always play a factor I'm sure but I'm betting Google knows a lot more about random than I do and I also think that they're very calculating. Bottom line, I just keep testing like everyone else and hope the people who say adjustments can make a difference are still right.