I think the main import of the story (outside of why Kincaid shot Harry in the chest and that Ivy (almost certainly) fired him) is that Kincaid is much less of a mercenary than he thinks he is. Imo, you can scratch out every "if I wasn't just a mercenary" or it's functional equivalent in the story.
I'm also going to say it here: Ivy contacted Mab and told her what was going to happen, but waited until Kincaid's flight landed or something. That's how Mab knew to save him, and that's why Ivy insisted on a center-mass shot instead of a headshot.
Ivy works through proxies.
@Yuillegan: The Archive wasn't built to be neutral. That's a lie. It's the Archive's cover. Now, the Archive may have been built to maintain the appearance of neutrality, hence proxies.
Why is everyone saying Harry is a bad friend? As magnuskn points out, up until
Skin Game, Harry has largely been kept in isolation. We don't see what Harry's doing on a day to day basis often. In at least five of the stories in between we see Harry being involved with friends and family. (Day Off, Zoo Day, It's My Birthday Too, Something Borrowed, Christmas Eve). You could count Jury Duty with Billy helping him move. That's not counting any stories where he's hired by a "friend." The only "friends" he doesn't seem to keep up with are the ones who tell him not to try to contact him.
Harry, and everyone else on Earth, is basically in constant contact with Ivy. The difference between Harry and everyone else is that Harry knows it, and Ivy knows Harry knows it. If Harry made a banking transaction, Ivy knew he was alive. When Harry showed up for jury duty, Ivy knew Harry was alive. Honestly, I would be surprised if Harry didn't think about it every other time he wrote something that he would be embarrassed to say in front of Ivy. Also, how do we know he hasn't dropped Ivy, or anyone else for that matter, a line? We know Butters has his presumably new phone number. We didn't see Harry give it to him. He's clearly in contact with Billy. Things happen off page. Reading all of them would be annoying. Like when certain writers take a few pages every chapter or two to write about certain things that in now way advance the plot.
I agree with g33k's reading that it is possible, but unlikely, that Ivy didn't fire Kincaid.