Deader Than Disco: The Wii ports were less than pleasingly received. They went entirely unchanged, so you were basically playing what now looks like a mediocre and short game on a console that has far more power to be utilized. Because of this, most fans weren't too depressed when it was discovered they were doing it illegally.
Periphery Demographic: The games have attracted a lot of older fans, mostly from those who grew up on them. Admittedly, it was popular among the parents of these kids as well, especially because of the great writing with the occasional Parental Bonus. Ron Gilbert even stated in an interview that when their kids went to bed, parents would be sneaking off onto their computers playing these games as a Guilty Pleasure.