Points are back for me. Apparently it's a beta program.
You can see how many points you have here:
https://smile.amazon.com/kindlerewards/
Edit: CathyA's post is much more informative.
https://www.mobileread.com/forums/sh...2&postcount=15
However, I'm not seeing the $2 Great on Kindle credit on the Bourdain book she mentioned. Possibly a timed or targeted promotion.