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.
Brand building is a long process.
It is a process that should not be hurried.
I think the trend has shifted a little. I'd like to think that, previously, signature campaign's goal is to establish their brand on customer's image through repetition by seeing it everywhere on any thread, or to convince new players to try because they see the banner on a thread they're reading.
Nowadays, signature campaign seems to change their approach. Well, I think it's actually the hard work of their campaign managers who hand-picked these people. They no longer aim to build a brand awareness through repetition. But rather, they try to establish trust by having reputable members to wear their signature, knowing that those reputable members will not stand still if there is an issue with the casino. Not in the sense that they'll blindly defend the casino, no; Quite the opposite, they'll take action.
As such, as long as those reputable member "wear" the casino, it can be safe to assume the casino is trustworthy, and ultimately, they get a boost of reputation.