Reason I mentioned Arnold Clark was because I worked there, they used to be the same, Clark Cover, Special cleaning stuff on your car, GAP insurance, all incentives to build up on our commission which at times was paltry but the base rate was OK, not that my manager wanted me earning anywhere near that, he wanted 20 sales the first month, then 40, then 60 and if you got below it he was threatening you with the sack, not great when you are competing with him and his other 2 managers who would come along and swipe your customer away and 15 other salesmen all trying to get the same as you.
I get why they do it, but it was not for me, stress nearly did me in after 3 months.