I often go to bottomline.com and find alot of this information. They also warn about Epasses on the highway and encourage to occassionally pay cash. All of this information can be out there.
What I don't like about this is that sometimes I lend my card to people visiting me or to someone in the line that doesn't have a card. So that's not a true picture of my shopping habits since other people use my card or could even use my phone number that would give them excess to my card to use.
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