When you place and ad here you are not redirected to the Bali Advertiser but to a sister website of the forum called Bali Advertising.
http://www.baliadvertising.net
There are new ads posted there daily.
I think if those ads were allowed here, we would have a lot more one time posters placing the ads, not placing them in the correct branch/threads and the forum would become very cluttered.
I am using baliadvertising myself for an ad at the moment and have no problem posting it there rather than here. :)