There is a single donation rank. If you donate (minimum $5), you will get access to the commands /craft and /hat, one free public warp on the server (it will be in the server warp room at spawn - anyone can use it), and a [$] tag will be added next to your name. To make sure we know it's you, you can add a "special instructions" message with your in game name when you donate, or tell us when we see you online the email address you used so that we can verify it matches up. You can donate by clicking here and entering the information needed to process your donation. Donations are not instant however, it will take some time, albeit a small amount of time, until your rank is set to Donor.
Note that donating is not required, and the server is not a Pay2Win. You can purchase the commands /craft and /hat in the adminshop for in-game currency, and you can also purchase a private warp there.