the article/post say DRK is just a copy of Bitcoin CoinJoin (eg: Bitcoin's Dark Wallet), so , this is where the name Dark coming from? I guessed so.
Basically DRK/darksend is just a copy of Dark Wallet and this is why the coder can't seem to fix any DRK problem. CoinJoin is still an experiment! This answer my question to why DRK instamined too much/half of their coins.