In episode 166 of Semantic Mastery's weekly Hump Day Hangouts, one participant asked whether Google will penalize a review/product type rich snippet that is placed on the homepage of a website.
The exact question was:
I remember I read somewhere that putting a review/product type rich-snippet data on your homepage (instead of an organization/webpage/article type) is not good, cause google will penalize you somehow? I mean a review/product type schema which shows those review stars below your listing on the SERPs (for better CTR). Is this true or just a gossip?