<a href="https:&#x2F;&#x2F;feedback.uservoice.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;feedback.uservoice.com&#x2F;</a> has such a feature. (Very expensive, but they started small, too).<p>In my experience when competing sites were using it it backfired. The top ideas were stuff like &quot;website too slow&quot;, &quot;my order didn&#x27;t arrive&quot; or requests which were unreasonable.