Compulsory 3D Glasses Purchase & Good Review Rebates found by Yangzhou Watchdog 

It was a sports goods factory in Jiangdu District which was found by Yangzhou Municipal Market Supervision Bureau to be offering cash rebates for positive reviews, while the cinema in question had made 2,935 forcible sales of 3D glasses. Full story (in Chinese) via this link; read the absolute essentials about Yangzhou via this link.