This forum is provided to help Audacity users to use Audacity effectively. It is a very popular forum, and we could sell advertising space for a lot of money, but we choose not to because most of the users on this forum prefer the forum to be advert free. If you want to post banners / adverts, there are plenty of forums that allow you to do that, but this one doesn’t.
The forum team has worked very hard to maintain this forum as a safe and helpful corner of cyberspace for over 15 years.
I didn’t say you did but when we allowed signatures, we got a lot of posts abusing the feature. The forum “crew” were fewer in number back then, and it was taking so much time sorting the spam from the ham that it was severely affecting our ability to provide technical support.
in short, because I don’t know how to remove that option. It isn’t an option in the forum software settings.
The forum uses phpBB software. If you know how to remove that option, I’ll happily pass on a request to the system administrator.