Unknowing, that's still not quite accurate because at some point, every single NP$ in the system was bought from the bank. If I buy 1,000 NP$ for $20 at the bank and sell it to you for $17, you should still have $20 in buying power. You essentially made a profit of $3 when you bought mine for a better rate. When the money was revalued, RJ took your profit, forcing you to sell for $17 what you bought for $17 because it was a bargain that was really worth $20.
Again, like I said before though, the only rate that matters is the rate the bank was selling at. If I bought 1,000 NP$ for $20 at the bank and sold it to you for $13... it still had $20 in buying power... the value didn't change. You should have profited $7 by finding that bargain... but guess what, RJ forced you to take $17 for it, knocking your profit down to $4 and putting $3 in his own pocket. Even people who bought from another member instead of the bank got the shaft.
Trading between members doesn't effect the agreed upon rate that an NP$ represented. We can all agree an NP$ was selling for around 0.017 between members... but is that the rate you saw people conducting business and accepting NP$ for? Definitely not.
If I buy 1,000 NP$ from RJ for $20, and then sell it to you for $17, is there now only $17 in RJ's bank account? Obviously not, the 1,000 NP$ still represents the $20 in his bank account, no matter how much I sell it to someone else for. If you bought it for less than the face value, YOU should benefit from that, not RJ. This change not only forced people who bought it at 0.02 to accept 0.017, but it also is screwing the people who bought at a discount, essentially taking their profits.