>I'm not prepared to accept that random algo modifications having big impact on their revenue are done without concerns.
The effect on adsense revenue isn't even measured let alone used. The people who make decisions about changes to ranking algorithms don't even see the data on adsense revenue because we don't even have a system to collect it for ranking changes.
I work in search quality, and there are many metrics I have to collect to launch changes. None of them involve ads.
I'm glad to hear that, and I trust you. If it is this way I expect to find less spam engines or copied content in the next months when I search on google :)
The effect on adsense revenue isn't even measured let alone used. The people who make decisions about changes to ranking algorithms don't even see the data on adsense revenue because we don't even have a system to collect it for ranking changes.
I work in search quality, and there are many metrics I have to collect to launch changes. None of them involve ads.