They probably got paid like bethelites but they always made a few hundred dollars when visiting since publisher would give them envelops at the end of the visit.
Of course everything was paid for by the congregation.
I used to wonder when they turned in the expense to the elders at the end of the week and would usually come out to approx. $130, what did they spend the money on since meals were provided for them and they never drove their cars in service so that they would not put on miles on their cars.