If your PC gets infected with ransomware or a banking Trojan while using a leaked license, ESET will not offer support. They will simply state that the license is fraudulent. You have zero recourse.
Even "verified" keys are volatile.
Shared with thousands of people, leading to quick blacklisting by ESET. Short-term: Many are trial keys that expire after 30 days. t2botru eset nod32 keys verified