From the website:
Each issue of HN will have three novellas by three authors. Our ambition is for at least one of the three to be penned by a previously unpublished fiction writer.
We will be publishing one issue this year, using print-on-demand technology. Print-on-demand is typically used for self-publishing. We don’t think self-publishing deserves the negative press it receives – nobody bashes indie bands that release their own CDs – but that’s irrelevant here: Hayseed Novellas is not self-publishing, and it’s not vanity publishing. The publisher’s fiction will not be appearing in HN, nor are family, friends, or acquaintances of the publisher eligible to submit. Every one of our writers will be discovered in the slush pile.
It will be interesting to see how this develops. Novellas are, in fact, an untapped potential market, but this isn't without risk. In the UK they did the Quick Reads. I am unaware of whether the venture was considered successful, but those were published single title, not with three stories in one volume.
Something worth keeping an eye on, though.