You've started a new rotation in Brand Finance, working as the business partner for Ben & Jerry's in the Foods category, Japan. A Marketing Manager has been trialling an innovative social media campaign on both Twitter and Facebook to promote the new Peanut Butter Jelly flavour ice cream. The promotion offers consumers 10% off a tub of ice cream if they upload a photo of themselves eating Ben & Jerry's The best photos will be used in a future advertising campaign - in line with the latest marketing trends. Consumers can redeem the discount voucher in any national supermarket. There are mixed views on whether social media marketing campaigns are financially viable. Both campaigns have been running for one week and have the option to finish or continue for the full month. In your role as Finance Business Partner, Marketing are looking to you to recommend which one of the two campaigns is likely to result in the best return ogfinvestment if run for the full month.