The "stolen" part bugs me — even though it would be incredibly shitty to distribute cracked-from-source versions of Panic apps, I hope that Apple wouldn't prevent users from running them. I appreciate the malware protection built into macOS, but this might be an abuse of it.
Look at an example of one way the word "steal" is used in speech. If I say "Good artists copy; great artists steal", and I saying that great artists break into a building and illegally remove a physical artifact, or am I saying that they copy something for their own benefit? If one can "steal" an idea, then isn't that a "stolen idea"? And if that stolen idea is directly used to create some salable product, then isn't that a "stolen product", in that sense?
edit: The comment I responded to made the claim that source code couldn't be stolen, only copied (similar to the standard argument "it's copyright infringement, not theft", often applied to copied media). There was more, but I don't remember the wording, and I don't want to misrepresent the position.
It's not necessarily true that part of the value of source code is its secrecy, though. We'd like to believe that, but it's difficult to come up with evidence to support it. Most instances where source code is leaked result in no damage to the owner, for example.
Pretty sure the same could be said of KFC's secret spices recipe.