I wouldn't call it competition, the server probably doesn't even have over 100 players online without the spoofed characters. The owner has also logged in characters on ShadowCores to advertise for his OT and probably paid his players to advertise for Reptera on ShadowCores (because there was a time when lots of people were spamming our forums and ingame with reptera advertisement). Before the design he has on his website now, he also ripped ShadowCores layout, and the items in his website shop are copied directly from ShadowCores even with the description.
So it's more about that I dislike the owner of the server that I looked into this than eliminating competition, I would love to see some actual competition to ShadowCores though because that gives me more motivation to make ShadowCores even better. If I knew other servers on otservlist that were spoofing and I had proof for it, I would forward that information to xinn too.