IMHO: This must be a crappy rating. Chinese non-governmental rating on the ADA is A-. There is no doubt that bitcoin is A+, if you really invest in cryptocurrencies and treat them as your most valuable asset. This body may be suitable to give soda rating. 
Charles said most of the smart contracts currently being set up on ETH are junk, and 40% of them have serious security holes. Maybe we should also do a rating to tell people that artificial trans fat are AAA+++…In the past, ETH has been rolled back the blockchain, and Parity wallet has been a lot of big problems. If it is me, I will buy a lot of ETC instead of ETH!!!
If my ADA is frozen, stolen or rolled back in the future, I can mail my head to you. 
Added: Sorry I just saw this Weiss rating results = Ada in top 5 I was also fooled by the fake news, I subscribed to rating email but I do not know why I did not receive it, and I can not open their website either.
Already received the mail!