Now here's a small notifier - when you go to any Al Rifai shop (or other upscale brands for that matter) you can ask for nuts "packaged for travelling" (vacuum packed) which ends up condensing itself into a big lump you throw in your suitcase. Since Al Rifai is present in all major supermarkets, people end up buying its products (and have them vacuum packed) before reaching the airport.
I understand the airport concession must have been important to Al Rifai - and I myself used it many times. In the early oughts there was such a professional salesman there who could fill - exactly - a full kilo (meaning 1000 grams) without even using the weighing the balance!
But as the saying goes "min ma akhad emme sar 3amme" (whomever marries my mother becomes my stepfather), so at this stage, anyone still waiting for the last second to buy nuts would have to use the Castania concession at the airport. Brand loyalty goes this far I am afraid.