If the Society was to become a credit card merchant, there would be many other fees in addition to a transaction fee for each transaction such as establishment fees, joining fees, annual administration fees, monthly access fees, minimum merchant service fees, credit card authorisation fees.
On the other hand, as a PayPal merchant, the Society only has to pay a small transaction fee for each PayPal transaction. This is similar to the merchant fee that would apply for any credit card transaction.
Posted in: Online Payments