This works because almost all the US uses first-past-the-post elections for the Presidential general election. So you get outcomes like this:
Scenario 1:
Biden: 10 votes
Trump: 9 votes
Kennedy/Stein/West: 0 votes
Biden wins the state
Scenario 2:
Biden: 9 votes
Trump: 9 votes
Kennedy/Stein/West: 1 vote
Tied vote, decided by game of chance/lawsuit
Scenario 3:
Biden: 8 votes
Trump: 9 votes
Kennedy/Stein/West: 2 votes
Trump wins the state
This is why you see huge financial support from Republican billionaires for third party candidates who have no chance of winning.
Honestly, the bigger issue for dems has always been low enthusiasm leading to a lot of voters just refusing to vote.
It’s almost as if more people need to vote in the primaries
Yeah it’s more difficult with an incumbent because the Smarter Than You DNC decides a primary is bad, but if we actually voted in numbers then instead of just allowing the old people who actually vote in primaries to decide who is the one running, we’d actually have a candidate people can be excited for.