Did you bother to even look at the tutorial on their website? You know, the one mentioned in the comment you replied to?

https://massgrave.dev/manual_hwid_activation / https://massgrave.dev/manual_ohook_activation / https://massgrave.dev/manual_kms38_activation

Most of those 19861 lines allow it to be an all in one script for multiple activation methods and products. And, if you're still skeptical, then you are free to audit all 19861 lines yourself.

Maybe at the very least educate yourself before acting so smug.