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I think WeChat’s dominance is what makes QR codes possible. The U.S. seemed to go the route of distributing these services across official apps for each of the products.

users can do a QR code or facial recognition scan to receive up to 31 inches of toilet paper

The introduction of these smart toilet paper dispensers has reduced toilet paper use in Suzhou’s public restrooms by 80 percent

A valid use-case, though made me chuckle.

Would you want the public restroom to scan your face to get toilet paper?

Whenever a new technology matures, people would create a bunch of nonsense products anyway. Remember radium condoms? https://gizmodo.com/once-upon-a-time-we-used-radium-condoms-...

Another good use case of QR codes is to log in or sign up services on TVs and laptops. Scan once, then it's done. You don't need to enter the activation URL on another device or use any password manager.

I use a QR code in a photo frame to connect guests to my guest network at home. Works well enough.

This article really seems to view China through rose-tinted glasses.

How China is using QR codes