I'm thinking the mod shouldn't be used in events and whatnot because they can be exploited easily. However, this leaves players only wanting to use the money for the trade of services and there is no incentive to use the money.
Also, each week, some percentage of a person's total amount be added to their money to grow the amount of money everyone has, rounded towards one. Say if it were a 10% increase and I started with 100UC, at the end of the week I'd have 110UC. If I only had 1UC, it should only give me .10UC, but because it rounds towards 1, I would end up getting 1UC putting me at 2UC total. If I had 11UC, it should give me 1.10UC, but it rounds down towards 1, so I'd only get 1 UC putting me at 11UC total. If I had 202UC, it should give me 20.20UC, but it rounds down towards 1, so I'd only get 20UC putting me at 222UC.