Whatever happened to Jarrods helper/friend Mark?

I know this is old news, but I am curious as to the exact reasons why jarrods helper and friend Mark rage quit way back in the 3rd season, 10th episode (the full monty bello). It was probably one of the most dramatic moments on the show, but hasnt been referred to since. Giving the impression that jarrod and brandi have something to hide. Maybe they werent sharing their new found wealth with their friend?

Well, if any of you Californians happen to see him at an auction, invite him to the forum to give his side of the story. Same for Brandy & Jarrod.

It has been quite some time that the cold episode occurred but yes the suspense still lingers on until this very day. It would be great if they would appear in a comeback episode especially for them to clear the air instead of just focusing on an auction unit.