Though... the fact remains that he is taking the work of other people, clicking "copy/paste," and selling it as his own; that's called "Theft" where I live, and called "Socialism" in China... and called an "Economic Miracle" in Japan...
I'm kind of in agreement with
@harryno5 in that he is angling for counterfeit charges, and he is plainly violating the social contract.... but I would note that he has endured heinous fuckery most foul, and is (as a Terran Human) utterly alone, in enemy territory, and has only this skill to stay free.
The rules change when you're in danger of losing your life and/or freedom due to the oppression of those in power; people fight wars over this, and I'm in favor of it (fighting for your Freedom, and for personal Justice, I mean; they may seem in short supply, at times, but this MC has a right to fight for his own existence, so....)
The law, in this case, only applies for as long as his kidnappers can force it on him, and to fuckery with them if he can break free!