Three times that I am aware of. Once wiped the board clean and released it to the public. Lots of speculation that was the end of Q. A second time maybe a week or two ago, again wiping the board clear EXCEPT for two (transparent uplifiting message) posts. Friday added the new tripcode posts plus CASTLE post. Today took down the CASTLE post.
Significance? Who knows. It's action though.
Can you read page 1494 of the hr1625 and see how it relates?
I am wondering if it ties back to the Emergency deal that came out in December.
I can paste it here if you like.