What is left to judge a product? Only their website. But how accurate and trustworthy can a website be? White paper too aren't to be trusted, since 90% of the time they get changed work-in-progress.
What metrics do you use?
website is the fave of the project, therefore how do projects gets more investors if they dont have a professional like websites that contains of all the information of their projects. for me this is the one content that can convince me to invest in, and followed by white papers, roadmap/milestones, team members information, actual video reviews of all team members that talking about their projects. because with all of these, you can say that your investment is 60% safe than other scam projects out there.