How would voting work in zombie stage if we consider the zombie's being auctioned off?

The Zombie Idols are having body parts being auctioned off in a small competition. But what I find surprising is that the loser's bodypart gets to be auctioned off.

The body parts are valuable and people want to collect them. They are highly desired.

So, why would someone in the crowd vote for lets say Sua, when they want her body parts to be auctioned off??? Would the voting need to be reversed?? Like, the people that vote for Mizi are actually Sua's fans since they want Sua's body parts to be auctioned off?

Or is it all a matter of "I want my idol to last as long as possible" and the auctioned off body parts are just for the loser's Fans as consolation?