It is possible however you may struggle to sell it without some good proof of the players.
I could easily set up an affiliate account and play myself and earn $1000+ a month, sell the account and never play there again, you will have to prove there are a significant number of signup’s.
I am not saying this is what you have done, i am just trying to state that for this reason they are hard to sell and will you struggle to get anything like 6k for it.
Good luck