Free Gogo Passes to FlexPerks Credit Card Holders

If you have a US Bank Visa Signature FlexPerks credit card, you can get a dozen free Gogo inflight-wifi passes free.

You can repeat this every 12 months.

Register at https://promotions.gogoair.com/promotion/visaUS.do

Note that each pass can be used only on one flight segment, and they do not appear to be transferable.