Google requires news site isolate sponsored content!
 

Recently, Google twice said if the vendor website issued a "native advertising” or sponsorship, but not disclosing this information to the readers in the proper manner, or making the content look like ordinary news, so Google will take disciplinary action!
Matt Mr. Cutts ,Google anti-spam director , said if the vendor website failed to abide by the provisions of the Google, then Google removes the entire site from Google News Search!