Don't want to get off topic for this site, but I guess I still do not follow. Do you mean that is what you like or do not like about our site?
There is access to upcoming events and random photos that pop up on refresh as well as a scroll that shows the last 10 post topics. You just don't get full access to view and post until you register for free. People can also choose to become paying members and then have access to the members only section of the forum as well as the usual club meetings, events, newsletters, voting rights and so on.
If the for sale section was left open then joe blow can post whatever they want. That was one of the issues we had when we used to be on MSN, spam bots or whatever would log on and post junk stuff like viagra for sale. The forum and stuff we have now is not 100% exactly what I like, but it doesn't have spam and only costs the club $10 per month to run it. I prefer the way this forum runs over ours, but I do not have the knowledge and time to set it up, what we have works, and it is cheap. All good in my book.