You are right,casinos that runs signature campaigns continuously in the forum without stopping is benefiting more than those that just run it for awhile and stop. It is a strategy to show their loyalty to customers and their credibility.
They make more money because most signature campaign participants don't even have time to depend on this payment as they see it as a way to provide for their gambling habit,i.e they gamble with the SIG pay in the casino they are running signature campaign for. You pay me for a service and I use to money that you paid me to entertain myself in your casino. Betfury.io team should try and come back to continue with their campaign,for better promotion of their casino.
It is to be expected the owners and administrators of betfury know their situation way better than we do, if they are not promoting themselves in the forum through ads or a signature campaign it is not difficult to think a few reasons of why this is the case, a few of them are that they do not think it is necessary at the moment, they do not think they will obtain good results with it or simply they do not have the budget to do this at the moment.