The ethnic hair care & beauty market approached $3 billion in sales in 2011 (check out Packaged Facts, etc.). Not a small market. And in 2010, that market grew 13%.
There are big trends in social media around natural/naturally curly hair and beauty. I know a couple of startup founders who are building out apps in the ethnic beauty space, and there are already other social networks focused on hair-related issues for diverse women. Lots of high-traffic blogs, too.
All things considered, $1.4m isn't much.
ETA: Many women are very social around beauty, especially hair. I have naturally curly hair, and I can't tell you how many times I am complimented or asked questions (in person and online) by other women (and the occasional man) who are interested in chatting. Having an online network seems a natural next step.