I think a nice addition to the server should be a unique gamemode for cracked servers, not something that all of them have such as skywars, survival games etc. I know this gamemode is very entertaining and fun and may bring more people to the server and bring people who left back.
My suggestion is ``The Lab`` minigame.
The Lab
It is like a lab where a villager (tester) tests some minigames on testes. He grabs a lever and it randomly choose 3 minigames like spleef , electric floor (when yoi touch the white glass it becomes blue , green then red and players who touch red die) , pvp , build a snowman (there is snow everywhere and you get a shovel but you have to break pumpkins too to build as many snowmans as you can) , shoot mobs (like the /go testing arching mobs thing. The far the mob is , the most points you get) , pig run (every player controls a pig , you have an apple and a green dye in ur inventory. If u press the green dye the pig advances and if u press apple it goes back to beggining of race
. Any time you press one of them , they change slots in the hotbar) . Out of the 3 games choosen , 1st player in a game gets 3p, second 2p and third 1p , the player with most points after all the 3 games wins!
Gameplay videos:
https://youtu.be/UNbpAM1Ehy4 ,
https://youtu.be/bgdiQBeYQC4