Finally this coin looks promising and technically strong. It has nice features and i think there is nothing wrong if they cloned SDC source.
Every coin on the altcoin scene is forked from original bitcoin core, so it's just evolution process: take the best and make it better in the next generations.If you compare this coin with the other last ICOs and normal coins this is definitely the best featured one. If they will give credits to previous source code base there is absolutely nothing wrong: this is open source world, and remember that is only because Bitcoin got forked so many times that it gained so much popularity.
Said so, good job dev, excited to catch this train on early times