All outbound Emirates flights are topping up with fuel bought in UAE, the stuff is probably cheaper than water. They've got a great route structure with a modern and efficient fleet. They wont be making a loss any time soon.
NOT TRUE about the fuel I'm afraid.
As a 777 skipper the only flights I can remember tankering on are Tehran and Cairo, which are usually tankering-limited anyway on the old 777-200 non-ER due to residual centre tank fuel with max ZFWs.
Not sure where you got that info from.