I like the idea of a raffle system. I think the tickets should progressively become more expensive, so the more you buy, the more expensive they become. That does mean the prize item should actually be good so that people who want to buy into it will actually sink a lot of zeny in it. Things that could also act as zeny sinks:
- 30-Day Halter Lead for a mount
- New Item: Warp Stone (Like Kafra Service, but a consumable items that lets you warp to any city, costs 10k zeny)
- New Item: Dungeon Stone (Can buy a limited number of these per week, but they let you warp to a specific dungeon, costs 50k or 100k zeny depending on tier of dungeon)
Heck, maybe WP can even make an orphanage event where people can donate zeny to fund the orphanage and those players will be forever memorialized by placards showing who donated what. And at certain levels the orphanage provides server-wide benefits (exp boost for a week, drops boost, event pet, etc.). Might be a fun way to sink some zeny and get some server-wide incentive for pooling money. Maybe a special perk for someone who donates a certain amount of zeny, like an exclusive garment costume or something.