https://duckdice.io/faq#currencyexchange
Are you guys just using your own funds to make this exchanges?
you guys can use shapeshift api to make all this exchanges to lower this heavy fees. Shapeshift only have around 1-2% price margin so it will be good for users and they can save on exchange fees.
I never know if they have that huge fee, AFAIK some of other site put higher on exchange rate but never know if there is any fee on it. If this is high than exchanger then it is better to change on any outside exchanger rather than on here. May be process will be complicated a little bit but it does not waste huge fee on exchanger here. OP need to lower it to 1-2% fee may be to make this happen