Again, "this game is eventually going to close anyway" is not an argument for letting the game close sooner because of stupid decisions. EN FKG already reversed its position on certain issues because of user backlash. If you want Nutaku to give up on the idea of ranking rewards, the best thing you can do is raising a ruckus, preferably in places like Discord where Nutaku staff can see it.

If you're okay with the idea of ranking rewards, you should realize that a) this system runs a good chance of shortening the life of the game and b) people are therefore justified in not wanting it, so stop with this "how dare people complain about something that is obviously risky for the game" nonsense.

While I'd first like to see what the hell they're actually planning, the current user response is good because it may make exercise more care about their plans and encourage them to come up with something that is fair to both paying and non-paying players. One idea would be to implement a kind of "ranking medal", similar to whale medals and life crystals, that allows a top-ranking player to get some reward girl/equipment in X months and a low-ranking player to store his medals for a longer period of time and get the same reward in Y months.

Another, better idea would be to scrap ranking rewards altogether, because in all likelihood nothing good is going to come out of them.