I have a machine learning project where I expect to have a very similar problem in a couple months. My plan is to build a stripped down tech demo/MVP and post a show HN at that point, add the URL to my profile, etc. If you have that already, your issue is that you are gating access to it with an email signup.

IMO you either need to drop the requirement for an email signup (use an anonymous cookie instead) or present a much clearer value proposition to users that don't need any more spam in their in boxes. They aren't going to read or believe any "no spam" commitments you make in your privacy policy and there is no reason for me as a user to give you my email address.

One final note. An algorithm is not a product. My first programming gig was at a company with one mad genius who had developed a video compression algorithm that they couldn't make any money on because they didn't really understand that an algorithm wasn't product (they were trying to sell an ICM filter). We were able to pivot and built a number of products around the core algorithm (IPTV and video conferencing platforms) and spent 90% or more of the engineering dollars on "productizing" the algorithm (which we ultimately dumped in favor of h.264). The point here is that you don't seem to be selling a product and even if you see this as a "project" that you don't intend to monetize you are still asking for something from users (e.g. time and input) and need to give them a somewhat valuable product in return. Hope that helps.