Do new ones have a chance of becoming popular nowadays? And what can bring populatiry to a new casino?
Advertising their site through signature campaign can help new casino to gain players especially if the one who manage their campaign is a reputed manager here. Its hard to compete to old and trusted casino since they already prove their legitimacy, so new casino should have something to offer that is new for gamblers and more bonuses which is beneficial for players.
That would be a marketing strategy, in fact, all casino's doing it so before they have a final run. It is quite good and has a better result. But, not just to rely in all ads make it very popular but also to give some proofs that they can be trusted and have transparency.