A small misunderstanding regarding Darkcoin's masternodes:
It's completely decentralised. This is an improvement on the masternode (generic term: supernode) for two reasons:
- you don't create supernodes, which are big attractive targets for hackers
- you don't doubly incentivise hackers by requiring a large amount of coins be kept at a supernode.
Darkcoin's masternode doesn't have to hold the coins, you can keep them in cold wallet. For example my masternodes' wallets have 0 coins in them.
That's all, gl with the XC.