Ha! Those are very good reasons to have that impression.

Instead of 'endorsement' I should have said that I adopted polyamory.

As for the second point, I'll try to clarify my position in a later draft.

I will note that among the Bay Area rationalists I usually find myself being the one who has to defend the idea that non-polyamory might be good for some people, in the face of those who basically equate 'rational relationships' with 'polyamorous relationships.' :)