The Watchtower society just like any other corporation has periodic reports and dashboards to measure growth and performance and revenue is definietely one of the key indicators. No,it's not all about money, but it's still a key indicator.
Since the GB is not really profiting from the revenue, it's probably not very important to them, and they are likely more interested in prestige and power, but remember that the Watchtower Society corporate structure is not the same as the Christian Congregation of Jehovah Witnesses.
The CCJW is all about doing Jehoober's work, that's the fairytale corporation. The WTBTS is the business side, they care about money and growth. In fact, that's probably all they care about. You don't think they have a say in which policies will drive financial growth? I do. I think the team in charge of the financial affairs of the WT pushes for policies that will drive economic growth.