The rules on this are very simple, if you use the forum to help people and advise on things you know about when people ask, you can ask permission to advertise and almost definitely get it. If you only join to plug your villa for free, it isn't in the spirit of the forum and it will be deleted. Anyone who wants a free classified advert forum where people just USE a facility to plug their own personal things should set one up. This is a community, not Loot.