Pricing For Free Members

I have set up a new website for our non-profit.  Members join by making and annual donation through the website.   We also have a merch section and access to our Betterworld auction platform.  I understand that we will incur a 2.4% process fee from Stipe for the transactions.  All well and good.

There is a demand for Members only pages and I see that we can provide free access.  However, it is unclear as to the pricing.  Or would the standard 7% fee for Member Areas apply to the member donations, merch, etc.