Regarding your question related to tax on royalties, you would need to be aware that you would be paying royalties to a Switzerland entity and there is currently a withholding tax requirement of 10% on payments from Australia to Switzerland. This means that if you owe 100 in royalties, you would need to pay 90 to epic and remit 10 to Australia for withholding. This is of no cost to you (however as mentioned in the EULA you would need to send us paperwork related to the withholding).