[tjoff]

Is there any entity in the known universe with both the right incentives and at the same time is not completely incompetent and also are willing to spend enough resources on this - while not making any mistakes?

Anyone claiming to do this needs to be verified, that means that it has to be open. And being open does not by any stretch imply that it has been verified. And I will not do that just to use your product/site.

Bottom line: Just abandon and ignore anyone claiming to anonymize sensitive data.