What's the other side of 0% auto financing?

You’re not an active pain, more of an annoyance.

But, in reality, I don’t have a problem with that because I’m fine with getting my unit bonuses higher. There’s a reason that I outsold all of the other salesman when I worked the floor. I wasn’t afraid to take small deals, if the money wasn’t there to make.
Sales payplans, at good stores, typically work off of a percentage that bumps as you sell more cars. So you might get 10% F/B (Front and Back, front is how much above cost and pack – pack is how much the dealership marks it up on their books, so they don’t have to pay commission on it – back is finance) at or below 10 cars, 15% from 11-15 cars, 20% from 16-20 cars and 25% at 20 cars or above (that’s actually a really weird payplan, but you get the idea).

Keep in mind, that’s not 10-15-20-25% of the cost of the car, that’s of the profit on the car (above built-in expenses).
I got the big grosses out of customers, when I could… but when I couldn’t, I wouldn’t let the managers pass on minis.
ETA: And I was all over incoming phone and emails, and I’d take crap deals that didn’t require work, just for the reasons you mentioned. It was beneficial to me and the dealership. Dealerships wont tell you this, but based on the number of cars they sell, they get more cash per car from the factory.

That means if they’re 1 car away from their tier bonus, it pays for them to lose money selling you a car. at 40 Accords in a month, they might get 200 Dealer Cash per accord, at 41, they might get 300.