I am confused ! developing a mobile phone application that will require users to load their account with the app's coin by using card or bank transfer. This coin is used as gift on this platform *and the coin is also redeemable . My questions are;

1. Do I have to add VAT *to the price of the coin and
2. I searched and I am yet to see a platform/app where money or token/coins used as gift *are redeemable as cash deposit. is there any law anywhere against redeeming gift as cash deposit?

I need serious help with these questions.
Kind regards,