Be very careful making conclusions such as "HN thinks it's a good idea". Even discounting groupthink, there's a more powerful (related) selection bias effect. P

Be very careful making conclusions such as "HN thinks it's a good idea". Even discounting groupthink, there's a more powerful (related) selection bias effect. People who respond positively to an opinion are more likely to comment. With a small sample size you're completely at the whim of these two effects. That said, some of the specific advice might be useful. In particular, edw519's point that you should ensure that you collect customer information to continue the relationship is likely pretty wise.