"What's good for the goose..."
The overstriking of Spanish 8 reales and revaluation to 960 reis produced a profit for the Portuguese crown in Brazil. The silver coins were purchased at the going rate of about 750 reis, and then issued at a value of 960 reis, a 25-28% increase for each coin. Multiplied by the millions of coins struck turns out a tidy profit for the kingdom. Around 1814, someone, or a group of someones, got the idea to do the same: restrike Spanish 8 reales as 960 reis and profit.