I did read this and I have thought about it. The states mentioned - California, Nevada, and Pennsylvania - are winner-take-all states, meaning that a plurality rather than a majority is needed to win. Georgia has a different system. A majority is required to win election here. That makes a huge difference. In California, a third-party vote won't count against either candidate. In Georgia, a third-party vote counts against BOTH candidates.
I really can't make this any simpler for you to understand. I am voting against Thurmond. Thurmond needs a majority of the votes cast to win. Mine is included in the number of total votes. My vote won't be for him. Thus, I effectively negate a vote for Thurmond.