Hello,
so i came with my suggestion to create New Achievemnts Cape which u can get by reaching 250 Achievements Easy Cape, 500 Achievements Medium Cape, 750 Achievements Hard Cape, 1000 Achievements Elite Cape, and for all Achievements a Master Cape, so there the completion of Achievemnts will be bring people to be active and grind for it like those i hope its a great suggestion :)
https://gyazo.com/fff3a4ab36905bdcad120da320f87f88