Smart journalists screen capture the tweet and post it as a photo.

Sure, but a screenshot of a tweet is trivial to fake.

People who post to drama sites routinely take screenshots of tweets and posts from other sites because it's an easy way to have permanence even in the face of hostile moderation. This will just extend to normal journalists now.

At risk of finding out, what is a "drama site"? Do people actually have websites devoted to… drama?

You missed the KiwiFarms debacle?

Sure did. Searched it, and am not disappointed to have missed it.

What do you think TMZ is?

There are tons of subreddits that are devoted to catching some person or another with questionable tastes or interests in saying something they shouldn't. In these instances, rather than linking to the post (which may result in a moderator taking it down or the poster realizing how badly they're being dragged), they instead take a screenshot since it's a bulletproof way to retain the content.

Right now there are 1200 comments here. The drama you are looking for may be closer than you expect.

Yes, but it is probably (one of) the first times it was done so blatantly in Twitter's own interest.

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.