The point of the post was to show how easy it is, as people seem to miss these commands or may not be aware of how easy it is to set up a listening service. It'

The point of the post was to show how easy it is, as people seem to miss these commands or may not be aware of how easy it is to set up a listening service. It's exfiltration by definition, but you are of course free to mangle the data any way you want or use DNS techniques if you really care about hiding what you're doing, but that's a different post.