Donate via Paypal: 1 moolah = 1 USD
52 Moolah for 50 USD (that's +2 mooloah for you)
105 Moolah for 100 USD (gosh a +5!!)
215 Moolah for 200 USD (oh my golly! wow +15!!)
so, try computing how far you would go (spend) for your character. if you will give it a full set moolah items (wings costume mount and cards), donate at high amount and you will get your extra moolah. it's like buying in bulk orders and then you get a freebie!
*thinks* *edits*
but if you want it to be an event, like the 50% off event in retail every Christmas... uh well. uhm, idk. this ain't retail bro. D: