I second John's comment about winning Alliance SoMI.
About the only thing I don't agree with 100% is casting rituals for the PCs. There's plenty of players who would love nothing more than to cast rituals for other people. Now if that player can't find anyone in town to do it at all, or if they want to reduce the chance of failure or some such then yeah I'd think it could be ok to have some NPC casters take care of a ritual for a bunch of coin.
Here are some ideas that could be cool:
I would buy LCO rit scrolls, and components not to make items but to fuel rituals to help the town or spellcraft stuff for a mod. Any way to make my build a bit more useful for the town using formal is a bit more fun for ritualists and they would prolly spend coin on it. I'm not suggesting every time the town needs a ritual that it be sold to us but from time to time it could be cool.
Information is always something I would spend a few coins on. Especially information on how to kill the bad guy and win Alliance. LOL
NPCs that need/want money for training... heck from an RP perspective I'd pay to chat with a dragon mage about formal magic or some such. I'm sure some of the fighters would love to pay for a training session from some renowned warrior to give them a tip or two... Heck some of the npcs are good enough fighters you could prolly actually teach some of us how to fight/cast better while RPing it IG as some virtuoso of the blade/spell. It wouldn't be for everyone but I'm not so sure of myself that I couldn't use a few tips on what I actually do wrong in a fight and you (plot) are the best positioned to tell me how to improve since you kick my butt every time we play. I don't think everyone would be in for it.... but I think you would be surprised how many folks would part with a few IG coins to improve their OOG fighting skills.
To be serious... I really really would love to be able to buy or maybe earn some cool stuff/plot/whatnot through making IG money and spending it wisely.
Intangible rewards would be fun too. I know I and others who have spent money on buying food, potions, scrolls, and other things which were then turned over to plot as an IG donation to the war effort and not felt the impact directly. I think its most likely a perception issue and there's been plenty of impact but I've not felt it so didn't feel as rewarded for doing it. I of course wasn't looking for a direct reward but more of an intangible thing. At the end of the day, some of the players would prolly rather feel rewarded through intangible rewards than actual MIs, scrolls, etc.
There's chapters that have commerce systems that help with the flow of coin in and out of chapter/players hands. I think some of the PCs would love that idea... buy a few cows, a merchant caravan, or something like that and have a chance to make a bit of coin back.
Of course, if your scratching for coin, send out an NPC with a scroll or much needed Catalyst to auction off. I've seen certain scrolls go for 300+gold in other chapters and I see no reason why you couldn't bring some coin back to your coffers once or twice a season.
Let Matt Byers play Goblingy two or three times and get hundreds of copper back.
I'd love to buy a castle...Can I have one of those?
Sorry I've been spotty this season, I haven't had an overwhelming amount of cash or time to make all the events. I will try to be there for the closer and will most likely buy some potions from the guild, and from Bob to hand out to all the healers. Healers having more healing/protections is always a plus. Also can I have a quote on 100 5/ever terminates and a 50 gallon drum of hummus? They're for Ezra! There first is for my plan the second is for Casan's.

J/K
Paul