That's a complicated question, in large part because it was practically necessary that MBlume subsidize my housing and living expenses. (I was previously living with a roommate who did not require of me rent or grocery money, and very much approved of this arrangement; I didn't want to take a gigantic financial kick in the teeth and have to job-hunt when I'm not especially employable and move across the country for something that could have failed to work out in practice.) It seems unlikely on the face of it that he'd have been up for doing that for a secondary or n-th*ary. If he was, my answer is "maybe" - it would have depended on the exact circumstances, probably. If I liked his primary and would have been interested in dating her too (assuming she liked me back) I think I could have lived with being a member of a triad without explicit rankings; other arrangements would have been progressively less appealing and at some point I would have been necessarily skeptical that there was enough interest for both the relationship and the subsidy to persist. (One can emit arbitrary numbers of words about how one has enough love for everyone. Introducing money demands prioritization.)