While I agree that voting third part is unlikely to lead to a 3rd party victory this election cycle, it adds to that party's numbers and gets them closer to becoming a serious contender. So it does have more merit than not voting at all. 🙂
Unless you live in a handful of swing or proportional electoral college states this is the correct thing to do. If my vote swung it for Biden in my deep red state then he’d statistically already have 90% of the electoral votes.
If we ever have a popular vote for president I’ll change this.
I’ll still vote though for the down ballot races I may effect.