No one click on signature advertising.
it became boring idea to advertise . is sig advertisers fucked up ? big waste of money
fortunately not all company have same mind just like you and considering also signature campaign as one of good way to promote their service or website and i don't know what happen with OP but looks like he does have bad experience with signature campaign
Maybe no one clicks on his signature thus he think that sig campaign are just a waste of time

But yeah, i don't signature either but i saw a huge traffic increase from a few gambling website after they put a campaign
