They did provide a reason why they could do it - think there was a MyBB article about it as well. They get their IPC at exactly the same rates as other ISPs.
Sure they do. You do understand though that the money stays in the group. Telkom paying Telkom , so irrespective of the price the net result is zero. As long as TI are subsidized by Telkom it`s it`s merely a journal entry on the balance sheet.