As a marketing person, I can say that there is a thing we call a "marketing test" and those do not yield a lot of return. If something in marketing has been done plenty of times before (like an art contest) then it probably either returns a good amount of return, or it gives them a good reputation or something for them to keep it going. I personally do not believe that this is to be the case, they probably are getting a good return in amount and not just reputation, even if not the participants, but from people who see it. However, it could be something that loses money for them as well, wouldn't be able to calculate it correctly since there is no single data to draw it from.
I strongly support your opinion, and even more so you who are a professional on the subject, in fact I have always said something, marketing in all casino systems is very good, for me good marketing means that later you pay only according to the good casino tickets when they decide to make that extra investment.
I am also in favor that if a casino starts with a signature campaign, it is to guarantee success at a very good percentage, I do not have statistics, in fact I do not know if they are handled in the forum, but it would be interesting if they could be shown.