You'd have a hard time making a USB killer out of this, cos it doesn't contain the capacitance.
I see what you mean about that double negation. I mean that all the data on it is either stuff he's put in the public domain or licensed under something copyleft, so it wouldn't matter to him if all of that got out and got leaked on the darknet or something.
The main problem I can immediately think of it is could probably be made into some kind of keylogger, although that leads to the problem of getting the data off it if it then doesn't leave the presence of the recipient. I guess it'd have to hack the computer it's plugged into to get to it's networking stack to be able to exfiltrate your banking password and things. And then who would take that card off you; you don't pass on business cards second hand if you know what I mean, unless they were specifically interested in the technology then maybe you could get them.