Amazon

Seriously, do you know anyone who didn't buy something on Amazon.com during the holidays? The online retailer doesn't report specifics but an industry survey finds as much of 50 percent of holiday online shopping traffic flowed through Amazon.com.

And, millions of people who are regular shoppers have wisely paid the $99 fee to to be a Prime member and take advantage of free two-day shipping and other features.

Well, Amazon is now tempting Prime members with another incentive: A Visa credit card offering 5% back on all Amazon.com purchases. In addition, users will also get 2% off on non-Amazon purchases at gas stations, grocery stores and other retailers. There are no fees for the card but interest rates will be charged on all balances.

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