Improperly implemented rich snippet and potential Google penalty

Have you encountered a penalty for an improperly implemented rich snippet? The case: an online store (https://harmonystore.pl) with a company rating widget (global) in the footer. The schema with the rating is identical on every subpage. Every indexed subpage displays the same star rating. Could such implementation be considered spam (in light of the recent December Spam Update - this store has been penalized and has almost no impressions since 20th Dec)?