I have a certain amount of drama unfold (popcorn in hand) on a couple of forums regarding advertising commercial services. There appears to be an opinion that forum users who run a business shouldn't advertise unless they buy an ad.
Rules are pretty ad-hoc in here, at least until I get my arse in gear to write a TOS for the site. In the meantime, if you run a business that provides a useful and relevant service that people in the Range Rover community would benefit from then go right ahead, as long as you're not annoying folk. If you do okay out of it, great. If you make an absolute mint out of touting your wares on here, a contribution to the running costs would be in order :-)
As always, the overarching rule is Don't Be An Arse.