The motivations are straightforward but misguided:
Many cracked antivirus installers quietly enroll your machine into a botnet—a network of infected computers used for DDoS attacks, spam distribution, or credential stuffing without your knowledge. 94fbr eset internet security
Cracked software cannot access ESET’s update servers. Without virus signature updates, your "antivirus" becomes useless against new threats emerging daily. Zero-day attacks will sail right through. 94fbr eset internet security