Hi Asyakashi, the reasoning behind it is that the project is already fully funded, and we are not looking to raise capital out of the sale, but to bring awareness to the platform. Allowing only swaps through our native tokens allows us to do that, as more people will become aware of the existence of our platform through the purchasing of our utility token (SAP), so they won't be looking at it exclusively as a speculative instrument, but a truly powerful platform that allows individuals and companies to do business globally.