This year, Johnson may be the first Libertarian candidate since John Hospers (1972) to get an electoral vote. It will almost certainly be a faithless elector, same as with Hospers. Just throwing that out there.
However, I do have this even weirder idea about the Koch brothers throwing money at Johnson, not because they think he can win, but because he can siphon votes from Trump. The Koch brothers can’t control Trump, but they can control Clinton. I doubt this will happen, though.