There were some sites in this forum, had signature campaign but they were failed to gain interest, even few of them closed the site down after the the campaign.
The main idea is that when you are going to spend some money to advertise your product, you should realize about how good is your product, should realize the whole industry, if it is not competitive enough then you are absolutely going to waste your money for nothing.
You make some good points, but it all comes down to risk vs reward basically which is the foundation of the gambling world.
They should risk spending some money on advertising their site through a signature campaign which could be a short-term or long-term one in order to attract different kinds of gamblers from this forum.