Doesn't work for me either (in Safari; Firefox will pull it up though). Based on the (old) Stack Overflow answers, it's probably a combination of the HTML5 header/footer elements, and "wrapper" div ids pulling the "readability" score down.

https://stackoverflow.com/questions/2999600/how-to-disable-s...

Safari Version 11.0 (13604.1.38.1.6)

In case you're getting unsure: it works fine in Firefox's reader mode.

Even on the latest Safari it doesn't work: 10.13.1 (17B48) with macOS: 10.13.1 (17B48)

Nothing about that page seems like it would stop Reader so I filed a Radar about it.

Works for me with Safari Technology Preview 43 (Safari 11.1, WebKit 13605.1.12), High Sierra 10.13.2b1 (17C60c).

Ok thanks for the replies. I'll go troubleshooting!

Didn’t work for me either. Ios 11.1.

Works for me Firefox/iOS 11.0

Works for me on iOS Safari 11.0.3