First I would like to say I think the idea is pretty cool, it has potential. Anway..
1) Put all of the "mini games" that no one goes to into event. This includes, but not limited to,
- Boomo
- Hunger Games
- Infected
Keep the prize pool at 35k and in infected if zombies win just split among the contestants.
2) When more games are added have the events cycle. This way games won't get too boring quickly.
3) I have a few event suggestions:
- Snowball fight (2 teams, lava behind both). Everyone has a limited amount of snowballs. Maybe 256 snowballs per person initially? Chests with snowballs spawn near lava as bait. But high risk high reward.
- (i had some more ideas but now I have a brain fart and forgot, I'll update it later)