Hourly Rock-Around-the-Clock prizes are drawn randomly from a pool of any nonprofit that received a minimum $10 donation in that hour each hour of the 24-hour giving period. Based on the operational budget entered when creating a profile, all nonprofits are divided into "small" (<$100,000), "medium" ($100,001 to $750,000), and "large"(>$750,001) categories. One nonprofit from each category ("small", "medium", and "large") will be awarded $500 each hour. Organizations may win one Rock-Around-the-Clock prize.