I saw Powerman 5000 open for Primus and (I think) White Zombie, around '96-'97. They were really, really bad. Their PA was so horribly set that it sounded like one big noisy clusterfuck. They were AWFUL. Primus and Zombie were good, though.
Well, I guess you can't really call it a sellout, considering "sellout" was basically the definition of the band when "Starship" did "We Built This City". This was so bad I didn't even laugh listening to it.