Greed eventually kills
All those that voted yes to continue should be watched and/or gotten rid of asap because their greed will put you that voted no in greater danger. It's most likely those that voted yes had nothing else to lose and didn't care if they died or not, only to win and hope to get that money.
Gi-Hun should've explained to In-Ho that they should at least let those that want to leave, leave. There is plenty of tryhards to murder all except one winner. It's like the lottery but when you lose you won't get to try try again.