That´s the one they call Spitfire, right? I had my hands on it a few years ago and I really liked it.I remember there was a smaller version that was somewhat less well constructed.
I carried that knife and was impressed! I don't think Spyderco is going to worry, as they are almost a cultural icon themselves. Just the same, that's a great knife!
I don't think Spyderco is loosing any sleep. Nor should they.