I believe that i already answer that question... check ROSCoin and you will see that i'm dedicated enough to keep a coin on a exchange for almost a year. That is something that cannot be said by thousands of other clones
..... Anything else? A coin being on an exchange is hardly unique.
Sooo....
A coin on a exchange after one year is pretty unique in fact You really have to check all the coins that were delisted by trex in that period of time, all the coins that even didn't hit a exchange at all. How many coins were there already launched? 2000? 3000? how many are still listed on a exchange? 200?