Unsold and unreleased "hidden" Steam free games, more than 130,000 people for some reason, a record high. Actually... Is it a sign of piracy damage that plagues popular works?

Unsold and unreleased "hidden" Steam free games, more than 130,000 people for some reason, a record high. Actually... Is it a sign of piracy damage that plagues popular works?
It seems that there is a suspicion that the venerable game provided as a test environment on Steam is being misused for piracy....

The linked article is in Japanese.