So, this certainly isn't a "terrible deal" as a lot of people are putting it... It has just split the bulk rate between the store and the truckload:
Store Full (900): $0.055 per donut
Gil Deal (576): $0.0607 per donut
Truckload (300): $0.066 per donut
Additionally, if you add the cost of the item you are getting, then it actually is better than the store full. Based on the only item I have seen so far, the Ferris Wheel, which is 120 donuts:
Gil Deal (696): $0.0502 per donut
Obviously, you are never going to beat the value of the boatload ($0.0416 per donut)...but there are also a lot of people, like myself, who aren't going to sink $100 into donuts....