The current mods gather around an old Oak table in a dungeon, with kestas at the head of the table, and the most active mod to his right, the next most to his left, the third most active next to the most active etc. down the table. Then, lots are drawn to decide an order in which mods make suggestions for new mods. When each mod has made a suggestion, Kestas writes the names of the suggested mods on card, before dipping the card into melted wax. Each card is then placed upon a flame, and the last card to burn denotes the person who will become a Mod.
We then trace that person's home and kidnap him at midnight on a new moon. He is shackled and taken down to the dungeon, given an extensive training in all things modding over the course of a month, and then released indoctrinated in the ways of webdip modship. From then on they never escape, only drift from place to place returning to work as a mod during every Christmas holiday, every Easter, every quiet night in...never escaping the spell...never...