Today is the long awaited day. It's Costco switchover day! Beginning today, Costco official begins accepts of Visa credit cards. As you may remember, in a surprising turn of events Citi purchased the Costco portfolio from Amex. This stunning blow cost Amex 10% of its entire portfolio. Amex not only lost exclusive rights to Costco, but all of the cardholder accounts were … [Read more...] about Costco Switchover Day