Once again fathom we return to you believing everything that Google says, by quoting Google employee statements, even though you say you don't.
I could not find your case studies maybe you could post a thread on them.
I don't think I am allowed to post a direct link to the case studies. But I will provide you some final stats for one of them and a snippet you can use to find it on your own, if you so choose.
The goal - test if blasting 100s of thousands links each day can penalize site or help it?
Site 1 - Wikipedia Page - position 3 (starting position = 4) Site 2 - Government Site - 258 (starting position = 36) Site 3 - Small Private Site - Not in top500 (starting position = 42)
Every website not whitelisted is vulnerable to external forces outside of their control. I believe this because I have watched many of these case studies with interest, and they all end in some unknown website being driven into oblivion.
I won't discuss this any further with you fathom. My opinion is formed by evidence whereas yours appears to subjectively based on biased interpretations of what Google employees say. Such statements by Google employees are not evidence but merely public statements that are in direct conflict with everything I have witnessed.