The PP F and F is for ensuring monies are easily made available to others, it is not a Sale Transaction.
Hence once a payment for goods is made, there is no sopport from PP when a discontented buyer makes a complaint.
I bet there is not a Case of a Vendor receiving monies from this method of Transaction having attempted to makie a case via PP about a sale outcome..
PP F and F, is the ideal one way loaded protection for a Vendor.