(Why? Simple...now you can buy Bs.F 3.3(ish) worth of bonds and immediately resell them for $1. Every part of the transaction is legal. So, in effect, there's a second legal price for the bolivar that's higher than the official Bs.F2.15/$.)
"But," El Troudi quickly added, "that flexibilization will never derive into a differential system in any of its forms, such as a dual exchange rate. There shall be one exchange rate."
Which is a lot like saying that yes, admittedly, your sister does trade sex for money, but that will never derive into prostitution in any of its forms...