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By golero / Getty Images When Brazil’s central bank announced in 2020 it was launching a free electronic payments system called PIX, many people had no idea what it was talking about. When Brazil’s central bank announced in 2020 it was launching a free electronic payments system called PIX, many people had no idea what it was talking about. Today, instant transfers are so ubiquitous, Brazilians use them tens of millions of times a day, for everything from paying the rent to buying groceries to giving money to beggars on the street. Walking amid cars stopped at a red light in Sao Paulo, panhand…