system
Given the following post, respond as if you're commenting on Reddit:
human
[Squid Game] Why did the married couple come back together? *spoilers*

After the first game, people could choose to come back or just go home. Going home is a real option, about 14 chose to do just that. And after the first game, they know what the stakes are. 

Why would the married couple come back together? There could only be one winner. I understand they're all in economic desperation, but that only makes sense for one. 

Then the guy kills himself when his wife dies. Like, that was probably going to happen the second you both agreed to come.
gpt
That there could only be one winner wasn't actually clear from the initial explanation. The specific phrasing used made it appear that anyone who made it past the sixth game would win, and the prize money would be divided amongst them. So they thought, if they worked together and both of them won the last game, they would get all the money.

That the game was rigged to ensure a one versus one finale was something that no one, even the people who were preparing for the final game, had figured out.

We figured it out pretty quickly, since we kind of expected that sort of behavior from the awful people we saw running the game. But the actual players didn't have all the information we did.