As you know most of projects are scams and not paying , so if you wants to invest in some projects you should verify all links and ico ranking sites.
sometimes ico rating sites are not reliable at all, those sites are paid, some of them needed a more higher payment so that ICO will have a greater chance to be verified and have a good rating. know the credentials of the project , keenly look for the profile of all the team members, and if the project is very realistic and real.