i think it's important to protect new cryptocurrency fans on some information like dead and inactive coins as every day new coins are pumping into blockchain market.
here this link will help you identify many dead and inactive coins, so you can avoid being losing your funds
https://deadcoins.com and anyone have more to be added can let us know.
As I see the website you presented, most of the dead coin are deceased or Scam. Basically, the purpose of many ICO is to create a valuable coins that can be traded. If it cannot be trade, one thing for sure, either of the two, SCAM OR will be DECEASED.