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Payment for commodities can be made in various forms. Commonly money is used to establish value. At other times information has value. In the case of this harness my value was information, my payment was in the commodity, the harness. Is this a surprise?
One time I talked with a woman whose son was a pro snowboarder. He was on the payroll of a board manufacturer. In addition he got gear from other companies. All he had to do was wear the gear at demos, comps and while he was riding. What he did with the gear later was his choice. She said that he got boxes of sunglasses that retailed for $150 plus that he could sell to live pretty well. At the end of the day, the companies got value and so did the rider. This is a pretty common relationship with gear manufacturers.