Apparently there’s no official replacement yet, but I got a message from a user of the site, listing some places where IO/ASN refugees have headed:
https://nficstoryboard.com/ – Created and Ran by a member of ASN, Kinsey Bay
https://allcmnf.thebeachclub-ii.net/ – Ran by ASN admin iionly. Probably the best archive of old works, and best place for news, but not as active for new stories.
https://www.booksiesilk.com/house-stripping-and-humiliation-169 – Mostly refugees from blondies stripping and humiliation board
https://www.girlspns.com/ – Mainly refugees from the Teen Girl Pantsing/Stripping board
(These descriptions of these are as they were given to me)
Also of interest, there’s an archive of old stories here:
https://mega.nz/#F!wipSQAAR!okP1p0B_SvA4gOo_1oGbew