This. Most guys get some fat hookups with gear, sled accessories, and etc. Some guys get some indirect money like Brad Story who patented his propane turbo system and now (apparently) works for Boondocker selling and testing new products.
I know in other more lucrative industries you can get more. A friend of mine was a professional wakeboarder and his company gave him a truck and a new wake boat for free... and this was brand new stuff. $40,000 diesel Chevy and a $40,000 or more boat. He ended up rolling the pair of them on the highway outside of Las Vegas while on the way to a competition. The company brought him another truck/boat combo to Las Vegas and told him to get on the road.
If I was pro I'd just want to get my fuel paid for.