they did not. the attack did not change anything about the privacy and anonymity. it isn't even an exploit, its simply using tens of million of dollar in mining costs to try doing a 51% attack and spread FUD which worked on you.
this isn't reddit. if you are trying to act like a know it all at least do basic research.
They have not reached 51%. 30% was so far the highest which means at worst they can do selfish mining. Again none of it is relevant to the topic of privacy and anonymity even if they did reach 51%.
