I think wolf.bet doesn't need to run their signature campaign again as their traffic site is enough / popular than before. But yea i noticed it too they would running it again on the future just like Haunebu said above.
Anyway, lets focus disscuss about wolfbet instead other gambling site on here.
Technically speaking coca cola doesn't need any ads neither by that logic, nor apple would need one. Basically no company that is known already wouldn't need any marketing. I am not saying the only marketing wolf.bet does is signature campaign, of course they spend money on other stuff as well but the reality is that if we do not have anything that is just niche that would not be full. They can or they may not end up doing a signature campaign here ever again, but if they end up doing it that doesn't really mean that it would hurt them a lot neither, it would be beneficial for them.
Of course it could cost them more than it helps them, but at least they would be still at the minds of the gamblers, even if they do not come now, they could come back later when they have a problem with their current casino. Which is why it is definitely a good idea, but not a "must have" idea at all.