Do you get any support inquiries? People should be more likely to respond to you after you helped them and already messaged back and forth a bit. Also, from the

Do you get any support inquiries? People should be more likely to respond to you after you helped them and already messaged back and forth a bit. Also, from the support messages you might already be able to tell what parts of your product need improvement or extension. If you don't get support requests, try making contacting you easier at potential pain points.