I don't think anyone really cares about that other coin you mentioned.  Compare the source with PIVX, and that's where you'll see the source came from...  of which credit was given where it was due via the MIT license that was included.  Noone else does that.  Matter of fact, a lot of other coins just delete the license file altogether and don't include it anywhere, which is a violation of the license.

Do me a favor and list 1 coin, just one that's on Graviex where code was not borrowed!  THAT IS THE PURPOSE of open source!  The license ENCOURAGES reusing code, modifying it, not modifying it, repurposing it, using as it, deleting it, etc.

So until then...

 __       __________ ______________  ___
/   \     /  \_____     \\______     \       \/    /
\    \/\/    //      |      \|             _/\           /
 \           //       |       \        |      \/          \
  \__/\   / \_______   /____|_   /___/\      \
          \/                \/            \/          \___/

Cheers,