I’m very rarely on Insta, and my Facebook automatically filters out messages that aren’t from friends.
I prefer the first one for serious (i.e., academic) correspondences. (And yes, I have 33 domain names.)
kentkchang / cmu.edu
kentkaihsiungchang / gmail
kent / kentkchang.com
kent / kentchang.org
If you tried to contact me via the following addresses, chances are I’ll never read your messages!