From the feedback here in HN it seems clear that you need a "suggest product" button. Maybe it could even be a Disqus on the bottom on the home page, which would automatically give you up/down votes functionality (;
We actually do have a suggest product button on Product Graveyard! If you click into any of the products and click the "Submit Autopsy Report" button in the nav bar, it should take you to a form where you can suggest which product we should feature next. Here is the direct link to it: https://siftery-track.typeform.com/to/n5IT7u