I think 'brand ambassadors' - the term used here is misleading. From a layman's point of view, a brand ambassador is usually a well known figure, who is paid to endorse a brand. I think your article highlights the fact that a woman's opinion matters and is given more importance simply because we assume that her views are purely based on her experiences with the product and are not vested. But the moment the same woman becomes a professional brand ambassador I believe men and women are given the same credibilty.
"...there’s no one a woman trusts more for advice, recommendations and guidance than another woman in her circle.”
This I completely agree with. But more women as brand ambassadors, I think that's a huge experiement. But the article is well written and throws a lot of light on 'social media and women', and why social media tactics must use more women to sell more products.