We are currently renting our signature space on the forum for advertising purposes. We're not coworkers here; it's business
I know that very well, but I wouldn't be 100% certain that's true from a legislation point of view. There's room for doubt, especially when this kind of advertisement is a necessity for the service.
When a brand advertises on television and the company ends up with Punishment, the TV company should not be punished.
The TV company, though, doesn't advertise anonymous services. Ever. Companies that desire to be advertised in the telly are registered trademarks.