Our niche ecommerce site has only one thing going for it: We have numerous opportunities on a weekly basis to get reviews from "mom bloggers".  We need links - our domain authority is depressing.  My concern is that these "mom bloggers" tend to have blogs that end with .blogspot.com or .wordpress.com.  How do I screen for "reviewers" that are worth getting links from and how can I make the most of the community we have available to us?