I am an Independent and intend to keep it that way. So i am not looking to join the party or any chapters. I voted Libertarian in '12, Bernie write-in in '16, and Green in '20. For third parties, my vote is very much dependent on who is heading up the ticket. Johnson (and/or Weld) were fine for me for the Libs, Howie and Angie were good for the Greens. I would not have voted for Jill Stein.
I was happy to vote for the Greens in '20 precisely in hopes of getting them enough signatures to get on the ballots. And given future sane candidates, i will consider voting for them again for the same reason.
And as an aside, back to the earlier discussion about Bernie and Trump voters, Bernie supporters and Libertarians may differ on economics, but they have otherwise a lot in common. Gary Johnson tried to appeal to Bernie voters in '16 with just that argument.