The only way anyone can add to the survey is to log into the site under one's own login credentials, which means having registered and set up a password. Many more people are likely to read through the forum postings than make a commitment to register and sign in. This can be an annoyance to some people who already have multiple passwords--I have over 300, many of which have to be changed every 90 days and never repeated. I am not sure that a lack of response to survey contributions necessarily means disinterest in S scale.
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