I´m now a Prime member of amazon.com.br. Here´s my experience so far:
1. My Brazilian credit card was easily accepted as a payment for prime membership.
2. They did accept my US credit card as a payment for the R$7,600.53 in merchandise but I was denied
by my US credit card issuer. I called them and they removed the block. But when I did repurchase, it was blocked again. I wonder it it´s the issuer because the charge was too high for an overseas purchase or they just don´t want their card to be placed online as payment in an overseas store. Or is it Amazon itself?
3. Then I tried boleto bancário. I hesitated for a while when I saw the Bank of America/Merrill Lynch
on the top left side of the Boleto. But I gathered courage and head on to Bradesco to pay. The cashier
windows closed and they reason COVID-19. Went to Banco do Brasil and the payment was easy and fast.
4. I paid Friday and the following day Saturday (yesterday), I checked the status of the orders and 3 of them was already being sent that day!