I guess I should wade in. One of the original goals/issues was to keep the forum advertising free, as opposed to others that had ads, pop-ups with every click, etc. I was more interested in a community atmosphere, rather than a commercial enterprise. The point was to encourage the exchange of information, ideas, and experiences, so that everything doesn't have to be re-invented by everyone.
So, if you have a few plants/cuttings for free or sale, or trade: that is part of the "community" idea. If you have a plant business, get a website: that is part of being a business.
I don't think that there have been any real problems or issues thus far and I think most if not all of the members can keep it that way.
A fellow in Canada e-mailed the other day that he used rooting techniques learned from Figs 4 Fun, and now had a problem: he made too many trees. So, I told him to start a thread about his problem, and he could probably find people with too few trees that could help him solve his problem. That is how it is supposed to work.