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Google does not make ranking changes based on revenue. We don't even collect statistics about that for ranking changes. Worrying about the fate of small sites in Google's rankings is a reasonable concern, and one that we share. But whatever you think we are doing incorrectly in ranking, it has nothing to do with making more money.
I know you're basically just trolling, but I'll reply seriously anyways.
I'm one of the people who makes changes to Google's rankings. As a result, for any change I want to make, I have to collect the statistics to justify it. This is done with the help of an analyst who has a different reporting chain from the ranking engineers in order to ensure that they remain unbiased. These statistics include things like what results people click on, how often people hit "next page," how humans rate the results before and after the change, etc. (None of these statistics involve ads or revenue in any way.) Once we've collected those statistics, the analyst writes up a report about the change summarizing their findings and pointing out any areas of concern.
This report is then presented at a weekly launch meeting, where the ranking leads review each change both for its metrics and for its complexity, ongoing infrastructure cost, etc. and make a decision about whether to launch it.
[edited by: aakk9999 at 7:13 pm (utc) on Oct 21, 2013]
[edit reason] Added link to Hacker News thread [/edit]
I'd assume they mean their own humans who do quality scoring?
joined:Sept 7, 2013