Well, I think one or two heirlooms are worth the big influx (I think there will be a lot more donations, don't know why) of money and a new official server.
If many people donate, the overal chance of winning the item for one of them decreases, and the more people donate, the less likely will someone that "invested" a big amount of money in the game to get the object will get it, so there's really no problem I think.