Thanks for the shoutout! This is another insightful post! I completely agree on the two points: (1) aim for clarity, not length, and (3) do whatever makes you happy. People often just blurt out anything without thinking of their audience. You must think of your audience at all times if you want to get the message of your post across. If you don't want to think about your audience, the second point "do whatever makes you happy" is a good reference. Just don't expect anything in return.

Now, on the other point you mentioned, (2) "less is often more" depends on context. We could tie that up to your bonus point. Context is king. Less is more when all efforts are directed towards making it clear and concise. When someone posts a very crisp and thought-provoking photo, even if there's no caption on it, as a curator I would always think of the process of how the photographer has arrived at that photo. If it's his original shot, we can deduce a lot of effort in there and I will most likely curate that post. Now compare that to a bunch of blurred photos with captions indicating what happened on that day, even if the length is substantial, I will most likely skip it.

As a curator, the author should keep me hooked to his post until the end, or else, I might as well take my time checking other's posts. "Less is more" if the information is clearly conveyed to me as the reader of the post.