Many will find it not to worth spending but a signature campaign is very effective when a business continue it for months.
Some casinos that have been able to keep their signature campaigns up and running for a long time in this forum without complains or have complains against them quickly resolved, have really gained the trust of many forum members.
There are many campaign I saw lasted only a few weeks. IMO it's waste of money.
When a casino is unable to keep their signature campaign up and running in the forum for a while and they just come and go, forum members who gamble and who usually recommend casinos to other gamblers may quickly forget about them, kind of like "out of sight is out of mind". This is one of the many big disadvantages with running short campaigns in this forum.