this is a private prepaid not via municipality or eskom direct
think of land lords or complexes that have 1 meter with the provider and private sub meters, you get a company to manage the prepaid for the sub meters they charge a set fee (not IBT) and extra fees - I dont want to say illegal but skirt a lot of regulations
That is the absolute worst.
Most sectional title setups have this. The complex has a main 3 phase meter from the council or Eskom and then they have their sub meters for each unit in the complex. They get the lower council rates while they charge more for electricity for each unit in the complex.