People should stop calling these polls useless. Once is useless, twice is kinda useless, more than 3 times is a trend that should be carefully analysed. People are really going to vote third-party in substantial numbers.
I have no doubt that if the election were held today, third parties would hit a record high. But it won't be. Third parties ALWAYS outpoll what they eventually get, it's just particularly drastic this year. They'll do better than in recent elections, but they will not be getting anywhere near the ridiculous numbers some of these polls are showing. People will drift back to their natural camps and not want to throw their vote away.