Frankly, you might as well not bother to vote if'n you're going to vote third party.

Advertising your party platform, signaling strength, and delegitimizing the electoral system are valid reasons to vote third party.

Frankly I won't take any third party seriously until they start caring about down ballot elections where they can make a difference, show people why they should be elected, and change the laws that keep them from being elected.

This is ridiculous. Third parties are not allowed to work within the electoral system, the DNC and GOP collude against that. The electoral system isn't some fantasy where a bunch of parties try to prove their worth, it's dominated by Capitalist donors and establishment parties, hence the necessity for delegitimizing it.