If money is tight:

These executables are prime vectors for malware.

Unlike traditional piracy, where the entire game is cracked and played offline, DLC unlockers often target legitimate owners of the base game who simply want to open the locked content. The game’s files are usually already present on the hard drive (downloaded via an update), but they are gated behind a license check. The unlocker manipulates the game's code to bypass this check, making the game "think" the user has a valid license for the Deluxe Pack, the Seven Deadly Sins, or the various suit packs.