Dont forget to follow up your campaign with various offers because players want to play in a casino not only because they saw the advertisement.
Advertisement is just a start for them to know your casino, once they know then they will look into what offers your provided in your casino.
Long campaign is good but it will be wasting of money if it is not followed by good offers for your potential players.
So if you want to see a good impact, signature campaign alone will never be enough as you may feel a bit disappointed if you get lower traffic than what you expect.
Maybe you get many visitors but the point is how many people come to be your players from those visitors, isn't it?