Prostituting
Sounds like those guys are having more fun with these builds than I am...
Seriously though, there is no monopoly on information on these forums. If someone is keeping a secret trick secret, there will be either 10 other tricks that will work too, or the "secret" trick really isn't and will come up anyway from someone else.
I bridge the worlds between making money and just fun, but I do think a builder's cam choice for a racer, as well as some other significant tricks in blueprinting, can be valid and worth paying for. In the end, if the full-time vendors help right up to that line, then charge for the remaining, good on them. It's capitalism
Additionally, I don't generally lump it in as free advertising either because the builders take their lumps like anyone else in a forum as well as use their time to respond. It's dangerous for their reputation, it's not like it's one sided. Additionally, time, coordination, the guts to try to feed yourself with an idea...all reasons to have something that keeps you unique. Heck, I bought both Jay's and Barry's books, can't really say they should have just hung it here for free can we?