I wasn't a fan of the "mulligan" deal....but our car was "iffy" at best traction wise so I purchased one and did end up using it. I did note that the first few of us up at the table had to sign the cards and put the car # on them when paying for them. Seems they just started handing them out blank after that.

FWIW I generally think the "buy back" guys, or "mulligan" racers in this scenario, should have to go into a separate group and race each other, OR be out of the main money race all together and race for a much lesser purse.