To expand on my earlier theory. Though Q's posts most likely carry multiple messages to multiple players, there might have been a thread between Q-team and Edward Snowden running throughout the most recent batch.

 

Q-Team communicates to Snowden:

 

Clock Activated.

 

March 7, 2017:

 

@Snowden

Extraction operation going live tomorrow (in less than 24 hours/-24).

 

Q-Team proves they are ready and nearby by releasing pictures of the open market in Hong Kong.

 

March 8, 2017:

 

@Snowden

 

'We kept the promise we made' and

'we can take you anytime'

 

You have less than 24 hours to reply to us via Twitter.

 

Indicate by a Tweet @Snowden (on Twitter) that your mission has been completed and indicate preferred course for extraction.

 

A: Air (by plane)

 

B: Land (car/train)

 

or:

 

C: by Sea (boat)

 

Within a day – on March 9, 2018

 

Snowden posts a 'public' and timely confirmation via a [re]Tweet on his Twitter account of a picture of himself alongside a friend who has written, strangely enough:

 

'I kept my word'

 

He is pictured holding a model boat, meaning he chose:

 

Option C: to be extracted at designated port and travel by water

 

'Watch the water'

 

Q-Team confirms the plan with Snowden with the post:

 

We saw your picture – proceed with plan.

 

24hours to respond.

He did, smartly.

Public view.