a google search would have informed that these are names given to search bot algorithm updates
search bots change, what was 'grey' SEO today, is black tomorrow,
the algorithm does not provide a penalty,
how your site responds to the bot operating under the algorithm determines whether there is a penalty
the benefit is always the same from grey SEO, temporary enhanced SEresults
the penalty is always the same from grey SEO, delisted from SEresults
the benefit is temporary, the penalty is permanent
This would be a good time to get a google webmaster tools account, and have them that makes the rules tell you personally where or if, you break the rules, and how to generally improve SER without breaking the rules