For anyone looking to join a NFL Playoff Pick'em, Fantasy Pros / BettingPros is sponsoring a free to play league with some great prizes. Figured it's worth the share with all of you. Here's the link on their site to read up on it: https://www.fantasypros.com/2019/12/playoff-pickem-contest-free-entry-w-prizes/
If you're looking for a site to run your NFL Playoff Pick'em or Survivor Pool league, check out playbalto.com. There's over 100+ custom features to run your league, easy invites, advanced player tracking tools, seamless messaging/communication and the ability to clone your pool for next season.