Do you trust more and ICO if they present a Minimum Product even if it has bugs? Do you look a the code repository before investing or you just look at ratings? You should not invest blindly!
If a project does not have a product, it is just a simple research. Imagine, even a thesis has product. ICO's that has MVP are those who succeed more. That is the real fact in crypto industry. If you want a 70% assurance to your investment, you need to look for MVP than whitepaper. Ratings are just an added tools for the beauties of the project, it can be bought by developers.