It may be accepted as a payment system, or it can be used for something else just like to get the discount fees, loyalty program and many more. But the developer is not yet releasing what will be the real purpose of EIDO token but just know about the fact if the tokens will be used to buy the card if that is not for free.
But the majority of DeFi is working in this area was putting their token as a way to participate in the loyalty program.