I believe the idea is that if you push the button, it goes on to someone else. If they DON’T push the button, they get skipped. It goes to someone else besides them. And so on, until SOMEONE does push the button. And at that point, the last person who pushed the button gets iced.
And so in that way, every person who pushes the button inevitably gets killed, removing selfish people from the world while morally upright people get passed over.
This isn’t detailed in the episode, it’s just my mind filling in between the lines.



$200,000 - which if you consider that it was 1980s money, makes Mr. Beast’s $10,000 look very small.
By “originally meant to” I think you are referring to the short story it was based on ending that way.
Frankly I find the twilight zone ending more chilling and suspenseful. The “do you think you really knew your husband” line is kinda sad trombone.