It may be, but it’s also a legitimate copy of the game.
I don’t know how GlockenGerda did it, but somehow she had something in GI which wouldn’t allow it to work with pirated copies of the game. There was plenty of evidence over the years in the GI thread that it worked because many people came to ask how to get it to work with their copy which they admitted they’d pirated.
She was also worried about trojans/spyware being used if the source was open.