Review Stars Disappeared in Google

Update 25 Feb: Looks like the star snippets are coming back. I have not seen any communication from Google of what caused the sudden drop. 

Barry Schwartz at SEOroundtable reported on Thursday that there was a big drop in the number of review star appearing in Google. And indeed, if you check Mozcast you can see that it dropped from 34.1 to 24.1 percent in the last three days. Read more