I presume all members of industry who are participating here are receiving some benefit. So do the hobbyists, but they are not selling anything or asked to pay to participate. We see when manufacturers discuss their products and dealers discuss the products they sell. Those perspectives are revealing and informative.
There are a lot of dealers here and often they distribute something as well. Most work to keep their products in a positive light, and the opportunity to do this in any thread is a benefit that they pay to have. I have no problem with that as long as they self-disclose. Manufacturers who describe their products and the basis of their designs -- granted proprietary information limitations -- can be very insightful.