My Starwood Account Was Compromised: More Details — and What Happened

Earlier today, I reported that my Starwood Preferred Guest frequent guest loyalty program account was compromised, with the Starpoints I earned wiped out of the account. Here is the story of how I found out about it; as well as what I did about it.

I checked my e-mail account as I usually do; and the first thing I saw was a message titled Enjoy Your Gift Certificate. “Great”, I initially thought, thinking that perhaps there was some kind of promotion or something where maybe I received a gift certificate for some small amount which I could enjoy somewhere…

…but then I scrolled down and found two additional e-mail messages with that title; as well as four e-mail messages titled Your SPG Account has been Updated. — two of them which contained the following text…