How many other company internal communications tweets have there been that stay up?

Are you claiming it is Twitter SOP to delete all tweets referencing internal communications from companies? Can you substantiate that?

From their company, yes, I am saying that.

As the old joke goes, we have freedom of speech in the USSR. We too can go to the middle of the Red Square, and denounce the American president there, with no negative consequences.

It's not very interesting to see an alleged champion of free speech allow speech he likes. It's far more telling to see what he does about speech he dislikes.

I'll take the lack of any evidence as you _can't_ substantiate that?

Perhaps, but unless this becomes a substantial portion of removals the hand-wringing about Twitter's APIs becoming "unreliable" seems overblown.