If you want to, you could post something in Don't Expect, Suggest. To me, there's a big difference between a member just wanting to share something useful they've done and spam/advertising, and I personally don't like how they all get lumped negatively. For example, there is a huge difference between a person who has been here awhile and wants to share something than a new person whose first post is, "Check out my site." In general, it is a gray area though, and I think it would be hard to not be accused of double standards. Of course the mods can use common sense, but whoever's threads do get closed will most likely still cry foul. I think part of the reason the rule has been like this is to avoid opening that can of worms.