I have been very skeptical of Libertarians. They are the most overrated group in American politics. On November 5 that is going to be shown again. I predict Robert Sarvis will get 3.9% of the vote. That is a far cry from the 9.5% he is polling right now.
Why? His lack of campaign structure will prevent him from getting supporters out to vote. In addition his campaign is build solely around people not liking the other two candidates. The easiest way to express that is to simply not vote which many of his supporters will do.
One thing that will be interesting is where he pulls his votes from.