From Page 22 of Fair Ninja WhitepaperFair Ninja is open to adding other cryptocurrency as payment options in the near future.
It is good to know that Fair Ninja is planning to add other cryptocurrencies as payment to their platform aside from Yoshi coin. I guess this will really have a great impact to crypto people because they do not need to convert their tokens and crypto to be able to buy their desired item from Fair Ninja. What a great plan! Good Job Fair Ninja team!