Ask HN: How can I adapt the business model to better serve a niche industry?

run a web app that allows people to create custom online stores that is tied into a fulfillment system. We originally created the site geared towards everyone: artist, designers, clothing companies, etc. We have discovered that this is just too large of a bite to chew.<p>I wanted to see if anyone had any advice or ideas on a niche market that could benefit from a platform like this? Basically what group we might be able to repurpose/reformat this for.