A bit late to the party but I do have some insight. PayPal is avoided to almost all cost when setting up online stores. PayPal had a very bad rep for holding back payments for every little complaint from customers. This is of course good for the customer but is hell for the store and i have personal exprience from helping store trying to get payment for goods delivered. Let just say that from people in the online store "community" noone is surpriced that PayPal is causing troubles.
EDIT: don't drink and write