It appears to have been sent to current and potential DT1 members who don't exclude Lauda. For example I'm not currently in DT1.
I'm currently DT1, don't exclude Lauda, and never received it. I did previously have Lauda included, but removed the inclusion before the PM was sent (I think - certainly hours before I saw it first mentioned) after reading about her issue with The Pharmacist.
Perhaps this is because certain IP addresses used to access your account match that of someone else of particular interest.