My theory about the Shinju is different. I don't think Kishi will introduce multiple Shinjus out of nowhere. Cause that in my opinion dilutes the overall Shinju theme.The "Fruit of the Shinju and the Shinju" theme can only be considered important if there is only "One Fruit" and only "One...
I made a theory connecting Orochimaru with Boruto and Kawaki: https://animebase.me/threads/the-demon-part-2.687887/post-20589066 . There are also some good theories by Rabbit Teth there.
The activity of NB was halved when Madara got blitzed by Black Zetsu. That chapter enraged the Naruto fandom.
At this point AB has outlasted many competing forums. Even if activity is not the best, there is assurance of long term forum support.