No, there isn't more, the US would certainly detail it in the indictment if there was. This is obviously a political prosecution against a guy they just didn't

No, there isn't more, the US would certainly detail it in the indictment if there was. This is obviously a political prosecution against a guy they just didn't like hanging out with guys they don't, and lending those guys a certain legitimacy in the process. He provided NK with nothing of value, as you say, they certainly know about cryptocurrency and have been using it for quite some time now.