"Dark to Light" that the Q posts use is masonic jargon. In fact, it's basically like their motto. What does that mean in context? Honestly, I think the Q group were probably a group of freemasons using their connections to attempt to rally support. It would explain the occasional inside information (and the eventual failure of the operation).

Clearly, any mason should have known what all the dark to light posts meant, so I would assume that was perhaps some type of recruitment statement? I do not know enough of their methods of encoding information to pick anything out (nor do I have the motivation to go through it with what I do know), but I would bet that some of the posts are encoded messages using some type of masonic principles.

Also, I would imagine this is where the "who you are talking to" bit comes in, as masons are the target of a lot of negative conspiracy theories, therefore most Q followed would be shocked to know it's masons.