They got an "A" rating from a rating site. What is the credibility of these rating sites, Who rates these sites?
I don't believe those websites, many times when I scroll ratings I see that some votes are casted by bots, would you believe in such systems? I don't honestly. I just visit them to see new ICOs, that's it
It depends on the site. If there is a comprehensible write up about the project it can be credible. Many sites however only do some rolling of a dice with their numbers which makes them worthless.