The /amo/rating/ badge should display "rating x/5", but it now displays "downloads x/5".
Thanks. That was just fixed in #1127 which is waiting for review.
Fixed in #1127.
The text is still buggy on shield.io
Last deploy was 11 days ago. You can keep an eye on https://github.com/badges/shields/tree/gh-pages to see when the deploy happens.