There is a chance it might go bankrupt. I don't think it will, but with such poor management, it is a possibility. Unlike a lot of other religions, it is very centrally controlled, and bankruptcy would be more devastating than if it occurred in another religion. Further, I think the 7 popes at Warwick will sell every Kingdom Hall they can, before having their snouts pulled out of the trough, so there would probably not be much infrastructure left to continue the high control, if it came to that.
I think a more likely scenario is just a gradual decline, as ardent believers die off, to the point that even shunning is an ineffective tool because shunning is too isolating for the shunner.