Could you release an updated version on itch.io? It could be one version earlier than the latest one. Some of our users are unable to use their domestic bank cards to support you on the two websites you chose. We cannot use PayPal either. We hope you can sell software keys on itch.io for the verification of the official version. For the beta version of the game, we suggest a one-time purchase system (one version earlier than the latest one). After the latest version is released, based on the number of purchases on itch.io, offer discounts to those who buy the official version.