Just months after announcing its e-commerce Facebook tie-up, Mondelez International is already backing it to succeed. The snacks maker has seen experiments with its Philadelphia brand on the social network drive a 5% boost in sales. And while its claims of success may seem a little premature given the single-digit increase, it's worthwhile noting that the business has spent the bulk of 2014 learning about how it can tempt people to consider purchasing snacks online.