I'm going to vote for Harris, obviously. I don't care about 3rd parties, but when I was younger I did. And if I wanted both: (1) Harris to win (2) the Libertarians to get 5% to get elex funds I could take reasonable guesses about which might vote might likely have more of an effect.

Of course you can call that free loading, but again, for someone interested in 3rd parties, it actually seems pretty rational to me.