The Visa Signature line was first launched over a decade ago, originally touted as a premium credit card tier for the affluent. However today, this tier is being offered on an increasing number of mid-level, average cards. Furthermore, many banks are switching their existing cardmembers over to the Signature level whether the customer wants it or not. Why is this happening? Is the Visa Signature truly better than Platinum? What makes it different? You've probably seen those frequent (...