Yeah, I found it very interesting. Partly because there tends to be common stances that many (but not all) atheists tend to take. One example is gay rights. At first glance, they have nothing to do with atheism. However, the main reason people are against gay rights tend to be from religious beliefs. So atheists tend to favor gay rights because there is no reason not to.
So I was interested to see what they would think of polyamory. Unfortunately, polyamory is seen as tied to polygamy or more specifically religious polygyny. But at the same time, there are not a lot of reasons to be against it in a secular sense. So I think this is part of the debate that goes on withing the group that helps define how it sees an issue. I have a feeling that it will be seen as equivalent to gay rights as the discussion continues. But who knows? Maybe I am too optimistic?