He is a de facto channel of communication → TRUST KANSAS.
If he is asking us to follow his other account, it is because he is not going to be Secretary of State anymore, and wants us to keep an eye on his other messages.
Pompeo's personal account → https://twitter.com/mikepompeo
Nitter link → https://nitter.net/mikepompeo
If nothing else, he's kind of daring twatter to ban him by posting things that are basically government policy and/or government accomplishments... that seem to be coded Q references.
But coded well enough it would look like absurd paranoia to ban based on that.