Yes, I agree. When park rates are used to manage liquidity, they should be used with more care. If we show strong commitment to the peg, low interest rates should be attractive already. 20% effective interest in six months for any amount appears to me a huge risk for liabilities to run out of control.
Inattention, personal gain, or belief of effective promotion. I'd sure like to hear an argument for high rates at this point.
The remaining NuShares are not used for minting that I can see.
ATH = all time high
(I didn't know)
Perhaps the wallet leaked but the minting client wasn't touched. Had they not been minting, more NuShares could have been lost. Funds being locked by minting could explain making multiple transactions, but otherwise that would be odd.
Also keep in mind that after the block explorer was fixed, the balances changed. Previously, the address SSajkovCPXwdw46nyJ7vpTDkwtRZJzyY2z displayed 183,562,721 NSR, now it's 75,524,661 NSR. No transactions were made between.