I actually first read about this guy and movement in LP News back around 2000. I am not that familiar with the situation, but I heard over the years they drifted in a "less libertarian" direction or something else happened that made most U.S. Libertarians stop caring or paying attention. I know they used to make a big deal out of Guevara years ago.
It was also used as an example of Libertarian support/opportunity when your elections aren't winner-take-all.