Each game fork has its own rules. Additional forks may be possible if the particular game would allow it at the time. Reunifications must be legal in all affected forks.
[rab] It was sort of both. I guess I was wondering if this legendary wine was directly responsible for either the reckless expansion or the bizarre stream-of-consciousness games that resulted. My sympathies, anyway.
Some interesting reunifications suggest themselves, but I don't think it'll be my turn again for some time. Let's see what, if anything, everyone else makes of this.