I just found out Groupon save my cc info today too... =.=" damn it I never authorized them to store my cc info. And can't find the option to remove it manually.

Some more when make payment there is no any extra verification with me. =.=" It really makes my felt insecure instead of convenient.

Called their customer service and got this removed. Their reason is because Groupon is US based company and people in US felt convenient to save cc info with Groupon.............. =.=" no comment....