Dunno about that particular case. My general observation is that churches that do tithing are well of financially and have good margins. But here's another angle of the thing: If you do tithing as a kind of demand or must or under some kind of threat, then it might work counter effective. See it primarily as a practical solution and a fair way of putting things together. There are too many churches where some people give far above 10% monthly and others far less than so. It's a way of balancing things also. It's actually a minimum of what could be expected. And if the minimum works well, how much more the maximum?