If these companies are getting "eyes on product in action" for the mere cost of the item, it is a pretty good deal for them. Research the price of shooting a commercial and buying advertising space on TV, or in a magazine or journal. Go price the cost of renting a space at a major trade show and paying someone to demonstrate a product at the show.
Sure, we may all be a little jealous of Lanse getting free stuff but he is working hard at it and it took him years to get there. Good job, Lanse, and I hope it keeps working out for you.