Clearly this is about you feeling your IP has been exploited. I think it was a genuine error and no one is trying to use your name or CoinJoin to promote anything. The Darkcoin devs were merely trying to communicate that the coinmixing was done by a decentralised network of masternodes. If you want acknowledgement, then I'm sure they would be more than happy to acknowledge your valuable work.
Look, we can keep going but it's pretty clear to me what is happening here. You feel pissed. Perhaps rightly so but this could've been handled very differently. I'm not going to waste more energy on this negative stuff.