Don't they in Brazil have to pay a VAT as well when they are buying bitcoins? This sucks since this makes Bitcoin about 20% more expensive for the Brazilians.
Nevertheless, I am not surprised that Bitcoin purchases are exploding in Brazil if we take into consideration crazy volatility of their national currency.
Not, at least from consumer side.
There is no finantial regulation about Bitcoin in Brazil, so Bitcoin transaction and buys/sell won't pay special taxes, like happens in Eurozone and other places where Bitcoin is regulated
Brazil is also not sophisticated about enforcing any sort of taxes regarding online purchases anyway. That could change soon though.