Why are we not seeing any copycoins of this one? Is it somehow more difficult to clone?
Yeah it's probably a bit more difficult to clone because the launch procedure is a bit different and you have to know how to deal with the first few weeks where it runs in "bitcoin mode".
plus if you're going to do a copycoin for a pump and dump you chose a coin with a high market cap to try and get some of the people who missed out on buying the coin cheaply. But another possibility is a high market cap coin does a merger with xcn like darkcoin nearly did with shadowcoin as the mini blockchain would improve most of the top coins.