Sorry but the idea that their is only x amount of profit (available dollars to be made) is completely false which pretty much blows the rest of your theory out of the water.
I had air, roof vent, tv antenna all installed at battery depot Dave mentioned. They also built and installed my swing out gen mount. They have installed many espars.
Pm me if you have questions about them.
It was a legitimate question IMHO. Without a legitimate heat source people are going to idle it's only human nature. Being more comfortable allows drivers to perform better and stay out longer.
I did it all at different times. Mummy bags, buddy heaters, heat pads etc. Then I got my first Espar...