That's a valid idea, but I personally like the number ranks, as it is very precise. If your idea was executed properly, it could be good as well. Each rank get a certain prize, instead of Rank 1 only getting a prize. Like, Rank 1 player would still get the best prize, but the Diamond rank, for say, the highest rank other than just "1", would get 5k at the end of the month, Gold rank would get 2.5k, Bronze gets 2k, or something like that.. That'd be pretty cool.