Burger Time for the Apple ][ was apparently a pile of copy-protection triggers with a mediocre video game attached to it.
https://ia801505.us.archive.org/33/items/BurgerTime4amCrack/...
https://www.jwz.org/blog/2016/01/1982-burgertime-drm-was-har...
https://ia801505.us.archive.org/33/items/BurgerTime4amCrack/...
https://www.jwz.org/blog/2016/01/1982-burgertime-drm-was-har...
Luckily it seems like browsers are starting to retire that header soon anyway, so his annoying trick will break.
Secondly, you're absolutely correct, they're just stripping path information, not the domain.
Just open the link in incognito mode.