If they started giving ranks by playtime.
It would destroy the purpose of selling ranks and if party got no money for the server cuebdcraft wil be closed.
Think about it.
Nowhere in this thread is said that users with top time played will get ranks.
You misunderstood the title, "Ranking system" simply means something like warzone levels, or just numbers, i.e., 'a leaderboard for top time played users should be displayed on the cubedcraft website'