True, but all of them again have something of a "lasting relationship" (where relationship does not have to mean marriage, engagement, or going steady). Also, for me a harem needs a "center". Just some commune of 8 people who will "benefit" each other but are free to do whatever they want with whomever they like is an okay style of living, but to me not a harem. So as of now, possible oversights notwithstanding, I'd say for a constellation to feel "harem" to me (individually) needs to have a couple of things going on:
1) More than three people involved (I agree with the definition here).
2) One central person in whom everybody else is interested.
3) Everybody knows everything about the constellation and is okay with it.
4) Other persons of the harem may have relationships of any kind between them but not outside the harem, and they wouldn't usually have this relationship without the central character (some exceptions may exist, but "everyone with everyone" is not a harem to me). The central person may or may not pursue external relationships with or without approval from people in the harem.
5) A "long term commitment" - not necessarily from a legal point of view, like marriage, but the idea that for the forseeable future at least this arrangement will continue.
So for now for me, 1 and 2 look set in the long run, 3 has yet to materialize, as does 5. 4 would be a bit complicated to judge for me with Sally/Izzy if Izzy won't go for the MC.
