@Mtony75 The only other time I have heard of a large-ish instance going away (witches.town), the users of it had like three weeks or so notice.
This sort of thing probably will continue to happen from time to time, as anyone can start an instance. So it's wise to regularly back-up your data and such just in case your instance disappears without notice one day, or if they have a bad crash and lose everything. :o