“ Survivor : In the Hands of the Fans” has opened one last fan vote. During the penultimate episode of Season 50 on Wednesday, CBS opened a poll for fans to choose their favorite player. The winner will be announced during the live finale event in Los Angeles on May 20 and will receive a prize of $100,000 from pop star and “Survivor” superfan Sia. The Sia Fan Favorite prize marks the revival of a “Survivor” tradition. The series previously had an official Fan Favorite award that went away after Season 26; after that, Sia took it upon herself to reward her favorite players for several seasons. Since 2016, she has given more than $1,000,000 of her own money to “Survivor” players. Sia stopped giving out the prize after Season 45, but has revived it for the landmark 50th season — joining Billie Eilish, Zac Brown, Jimmy Fallon and MrBeast as a celebrity who contributed to the design of Season 50 in some way. Voting for the Sia Fan Favorite prize is open now and will close at 12 p.m.…