Monthly Donation Items (also known as DIs) are special items that were released on the first of every month alongside Toy Capsules until June 2014 when they were replaced by Lucky Scratch as the primary donation items.
Monthly Donation Items were sold in the Donation Shop for the entirety of the month and then cleared out when the next month's items were released, never to be released again. This makes the Monthly Donation Items limited in number which, depending on supply and demand, could increase their value over time. Current Monthly Donation Items could be bought from the Donation Shop for 200 Luna each, equaling $2.00 (USD). All past and present Monthly Donation Items can be bought from other users via trades.