It's not hard for Brazilians to donate via PayPal or credit card. It's as easy as someone in the USA. I donated today (I probably clicked on the English page, though) via PayPal.
Not preemptive, it's slow as hell to link a paypal account to your bank account and few people use credit cards because of the ridiculous interest rates.
I've been through this a lot before a couple of freelancer jobs filled my paypal account.
Because it's hard for Brazilians to donate via PayPal or credit card.
Always remember that donations schemes are not one-size-fits-all.