Large organizations and universities scan for pirated software. Using a stolen key can get your device flagged on the network.
The search term "free top" is a magnet for cybercriminals. Sites promising key generators (keygens) or cracked versions of MathType 7.4 often operate on a "pay-per-install" malware model. While the user is busy looking for a serial number to unlock an equation editor, the downloaded executable is frequently busy installing: mathtype 744516 product key free top