I have the same question.
The Jam's description makes me think that "misery bad" would be the way to go, but I'm still unsure. I think a game that is conventionally "bad" but still manages to be fun is harder to make, and thus encourages participants to actually make an effort rather than just spewing random things and calling it a day.
But yet again, that might not be the goal of this Jam and the host really wants shovelware kind of games. Either way, I'm ready to participate!