What? This is exactly the type of thing that you'd have highly motivated, highly competent attackers target. It's directly attached to money; it's technically

What? This is exactly the type of thing that you'd have highly motivated, highly competent attackers target. It's directly attached to money; it's technically convoluted, ugly, and difficult to understand also for the people programming them; once you steal it, it's yours; the source code is right there; the people who wrote the code are usually available to talk to/inspect their other code; it's not even exactly clear that this is theft per se and there's no jurisdiction that's really going to chase you down for it; so on and so on and so on. I'm not sure you could create a more compelling target if you tried.