I am also interested in protection measures against fake comments, etc. The platform is created to exclude scam, but projects can be influenced by feedback, comments and other things. How will you moderate so much content?
The weight of the user's assessment will mainly depend on the growth of his investment (in percent). If the user successfully invests in the ICO, then his estimate will be of great weight. If the user loses money on investing or he is a theorist and only evaluates projects without real investing, his estimate will have a small weight