I really wonder this. I never clicked a signature ad and am wondering if it works for gambling sites. I need to be enlightened in this topic, because it looks like a waste of money to me.
Advertising signature campaign was not a waste of money actually, it is very helpful and very effective promotion, and sometimes good background design can give attraction for the community to click it. because if this things was not a good idea, I think signature campaign here will no longer appear in the forum.