Most Middle East Airlines tanker round trip fuel to India and Pakistan. But on other sectors no.
Nobody knows how they price jet fuel in the gulf to themselves.
When you own both the Airline, the Airport, the local Airspace and ATC, the Jet fuel supplier, the Catering company, the Ground handling, the Ticket sales agency, the ground you walk on etc. AND THE OIL WELL.
Does it matter what you charge yourself.
You always WIN!
The Middle East Rules OK