Mandatory exchange to Faircoin
By default, the 10% net payment(pago en neto) to a member, but the minimum is 2% and the maximum is 100%(no maximum), member can convert 100% its payment to faircoins following the exchange rate of the date of the deposit to FreedomCoop account.
Maybe this should just apear as a text explanation in the 2nd payment confirmation(from FredoomCoop to member) and let the user decide via text messages what he wants.