Then there's "instant transactions", which as others showed was taken from Green Addresses, a system already available with Bitcoin.
If you read what
GreenAddress actually is, you will see they are not at all the same. It can never be used from personal wallets, as the recipient has to
trust the previously published sending address not to double spend.
This is just one more misunderstanding on what Darkcoin/DASH is in addition to uniform denominations, change handling, and whether masternodes actually send and receive coins.