Technical communities, including Malwarebytes Forums , strongly advise against using these specific repacks. If you are looking for secure, functional software:
: Many repacks are designed to install with a single click, automatically bypassing the complex serial number and license server setups required by the original manufacturers.
This is the number one reason. If a game like Red Dead Redemption 2 is 120GB, a repack might compress it down to 80GB or less. For users with data caps or slow internet, this is a lifesaver.