usually in the notes it will tell you which twitch acct is running the freeroll, if you watch for a while someone will mention the password or follow the twitcher (most times you can't write unless you are following them) and write !pw (I think that's code to ask for password). FYI there's a lot of people who can't play poker on those, so easy to win some chips, but easy to lose to someone who has no idea what's going on too!