A Bethelite signs a form to say they are not getting paid, they receive and living allowance that is unrelated to the work they do. (To prevent suing for being paid under award wages) It is 10 years since i was in bethel so i dont know the exact amounts, but it is somewhere around the following.
They get about $100 pm
plus a once a year allowance that is based on age, service etc that is around $500
plus if you have a car you get a monthly travel allowance at a cents per kilometre (or mile) rate that is capped at about $1500 per year.
In Australia you have to pay tax on the allowance (though if Bethel is the only source of income it is below the tax free threshold). However, as the car allowance is about 1/3 of the rate recommended by the tax department Bethelites get a large deduction that can be offset again any other income such as investements.