The WBTS is a corporation. All decisions are made to keep the corporation alive. There will always be faithful followers who need the religion and will help keep it alive with their work and money. They will make whatever investments necessary at the congregation level to keep the corporation going, acquire or sell...they are all business decisions.
They don't care about the preaching work. They know and have said it is completed. Now it is how do they keep it going with the least expense and keep the facade of importance to the faithful. They should have let go of the massive printing of the magazines 20 years ago...that was a long time coming and it was the old GB that didn't want the "work" to change.