the game is free
yes
Are there items (such as additional content, offers or currency) for sale that are used in the gameplay of your product?
yes
Can your product be used without making any in-app purchases?
yes
Are in-app purchases refundable?
no
What payment platform is used to facilitate these purchases? Do you use Epic Games’ platform or a 3rd-party (including your own) payment system?
we use Xsolla Game Commerce