The very essence behind Will This Happen has always been that it's a service people should discover by searching for it. In fact the name was picked from what people search most for (cheers Google Trends).
This meant that I decided to spend zero on marketing with no social media account in sight. What I didn't account for was Google refusing to list my site as the data was processed in JS rather than on the server in PHP. Cue a month of rewriting and am pleased to say Will This Happen is now (finally) visible on Google!