Show HN is good for technical feedback, but often HN won't match up well with the target audience. An example where this comes up is when HN commenters complai

Show HN is good for technical feedback, but often HN won't match up well with the target audience. An example where this comes up is when HN commenters complain about how they never read email newsletters so the sign up form / email required / create an account step is a "complete waste of time" (but email works!). The most effective approach to actually getting customers is to build a reputation as a problem-solver within the specific, related niche communities and then offer the new tool as an alternative solution to problems. Most people posting HN front-page follow-up note how the wave of traffic doesn't typically convert well.