This event does seem counterintuitive. One part is to collect pumpkin pies and the other part is use them to open prizes. The thing that boggles my mind is you can't complete one without hurting your chances on the other (not that there are any chances of completing without a ton of gold). If I attack all the time I can usually end up with 2-300 boxes, maybe I'll get a few prizes, but I'm lucky to get 10 open for units. This event is not only counterproductive, but is probably the least profitable event in regards to units. One silver lining is you can actually get prizes for having a few hundred boxes unopened which usually happens anyway, but 2000 is just ridiculous. Even if you got a box every attack it would still take over 4 days worth of stamina attacking every 3 minutes all day and night. Not going to happen. Gree probably makes the most money on small things like spending 200 gold with a lot more people than a few people spending 5000 gold. That is just my 2 cents and 2 cents that gree isn't getting from me.