Notice they didn't have any of the husband speaking on screen at the reveal. His reaction was the best part of the show. I'd have been pissed as well expecting a black car and a fricken cookie monster showed up.
As others have noted, my biggest issue with this show was showing a rendering of a black car/red stripe and backdooring a purple/white stripe car. IMO, that's a BS unethical move.
If they did that to me, that paint would get so f'd up that a repaint would soon follow. Hey kids, drag those bicycle handles on the side. :)
IIRC, they had a deal where the car had to be available for promo stuff for 2 years.
