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It could just be Google re-shuffling things and fine-tuning who gets stars and who doesn't. Here are a few things that have helped in my experience: Don't go crazy with the schema markup, especially for stars. I see people adding ratings to blog posts just to get stars, and those are all gone now. Add them where they make sense and are conventionally used (e.g. on product/place pages, not on category/type pages). Avoid re-using the same aggregate ratings or reviews that go into aggregate ratings on multiple pages. Make sure you've nested the right tags in the right orders according to the latest rules - they change sometimes. Sometimes the snippet tool will say something's correct when it's really out of order. Tag entities, not keywords. E.g. don't tag the entity as "The Marriottt Inn, Resort, and Spa in City, State" - tag it as "Marriott" or "Marriott Hotel" and list the location separately. If you're doing all these things it might just be a matter of weak entity association, borderline user metrics, or insufficient site trust.

You can always report them : https://www.google.com/webmasters/tools/spamreport?hl=en I guess you already know what the right answer is. play nice and hope that these guys sooner or later will be dealt with.