Rules that introduce new mechanics should be seen as academic research papers: someone tries something new, and writes up about it. Perhaps nobody likes it, or doesn’t buy it, and the new idea peters out. But perhaps many people like it, and a few years down the road, the idea is polished enough that it gets published as a commercial product. Very often, that is not the same person as the one who originally came up with the unpolished gem.
I also experiment quite a lot with different approaches to wargaming. E.g. see my Red vs Blue article (mass-participation real-time wargaming) in Miniature Wargames a few issues back. My intention is never to publish these ideas as commercial rules. But if someone is inspired by the idea and wants to develop it further, be my guest.
Tiny Tin Men Blog: http://snv-ttm.blogspot.com/
Wargaming Mechanics Blog: http://wargaming-mechanics.blogspot.com/