When I was a full-on believing JW I had an obsessive fascination with Mormonism. I read, studied and watched their propaganda with strange interest as well as their apostate Mormon books.
I have to say, they have a good scam going claiming that "the lord reintroduced tithing" in the modern age.
https://www.lds.org/scriptures/gs/tithes-tithing
It's my belief that the GB will introduce tithing outright eventually in my lifetime. It's just a matter of when and how they can spin it. 10% of your income tax free? That would cover their $4,000 a day fine with change left over. You'd probably bring in at least £5,000 per congregation per month. Given that there's around 62,000 KH's in the world that works out at over £300 million a month TAX FREE.
I bet the Bethel accounts dept are seething that old Rutherford didn't pull a scripture out of his ass back in 1931 to reintroduce it.