[BoppreH]

Aren't those index exclusions done by algorithms? If that's the case, just telling you why they removed you from their index would be a huge disclosure on Google's technologies.

Example: "Your website has been removed from our indexes because it displays too many X's.", when no other search engine has thought of filtering websites based on X.

And because the decision is probably based on many, many parameters and weighted, it would have to tell you the values (and descriptions!) of each one of them, making the message even more sensitive.