“Federal Election Commission records show Stein paid $100,000 in July to a consulting outfit that has worked with Republican campaigns, as well as Robert F. Kennedy Jr.’s independent presidential bid. The firm, Accelevate, is operated by Trent Pool. The Intercept reported that he appeared to be part of the mob that breached the grounds of the U.S. Capitol on Jan. 6., 2021. The Journal hasn’t independently verified the reporting.”
Without the electoral college though, the only time a third party candidate could act as a spoiler would be if they had a significant share of the vote. They deserve to be spoilers in those cases I think. My problem is with folks pulling in 1% - 3% of the vote in a single state ultimately deciding a national election.
But yeah, RCV would be the best way to ensure better representation (though honestly it can still easily have what could be viewed as “spoilers”)