I think everything is based on what is left in good. A casino need to have enough fund before they can advertise here cause they will be spending huge amount of money to advertise here especially through the use of campaign managers.
Many casinos may not have that fund which is the reason why they normally come here and create a thread where gamblers can ask questions and get link to their gambling site. Only platforms that has enough food can hire a campaign manager do advertise for them through signature .
For me, it is not a must to have a campaign here. Great if they can afford to.
Much better if they have working platform free from bugs and other issues.
As long as they take care of their players like no withdrawal issues, provable fairness in place, and others.
In time, they will earn their reputation even if they are not running their campaign.
But if they have more than enough funds, collaborating with known CM here will further give them positive response from the community.