TWI's attitude to giving is so against what the Bible teaches and the way God operates that it is unrecognisable. And what they teach about tithing isn't recognisable either. To whom were the tithes given, tithes of what, where to be presented, and when. And why (that's a big one, and not one that TWI has ever touched on) (it's not what you might think).
You can research it for yourself.
It is absolutely wrong to be checking up on people's incomes to make sure they tithed/donated any money. It's between individuals and God.
Here are the words of Jesus (yes, I know in the gospels, and only for our learning, hahahaha, as not part of the NT according to TWI) as recorded in Mt 6:
when you give to the needy, do not let your left hand know what your right hand is doing, 4so that your giving may be in secret.
Now just how private, how secret, is your giving supposed to be, if (hyperbolically) your left hand doesn't know what your right hand is doing? Your left hand can't know, but your twig leader can? Huh???
We were badly taught. But I do believe that God respects those who did give (even if from dishonest teaching).