iPhone Duo Owners Report Screens Breaking Along the Hinge

They are opening it wrong.

How do you open a single hinge device wrong?

OP was referring to a meme from the iPhone 4 era, where users complained about a dropped signal, and Steve Jobs responded to one person saying to not hold it a certain way.

https://knowyourmeme.com/memes/events/iphone-4-death-grip

Jobs wasn't exactly wrong (the antenna worked OK if you didn't bridge it with your finger):

https://www.wired.com/2010/06/iphone-4-holding-it-wrong/

But the "fix" was also disappointing: an insulating bumper, or $15 if you didn't want one:

https://www.cultofmac.com/apple-history/antennagate-payout

I see people claiming that others are "closing it wrong". Something about you have to snap it using the edges, absolutely not push into the center?

The "you are holding it wrong" company's latest innovation: "you are folding it wrong"

No one could have predicted this.

That's not just along the hinge though is it, MacRumours

iPhone due owner reports that they have too much money. So if they want to send me some i'll be really happy to help them spend them.

They only give it to large companies with sleek white aesthetics, sorry