How much is your credit card stealing from you?

You may be wondering why I’m obsessing so much about credit cards these days.  Don’t worry — the feeling is mutual.  If I had to specify why, it would probably be related to how the cash back you receive from buying things is about the easiest passive form of income you could ever find.  You’re literally changing nothing about your behaviour except which cards you sign up for and use.  And the payback can be massive — this post intends to show how massive.