[donking]

There is a main table, a 2nd table which is must move to the main table, and maybe a 3rd table which is must move to the 2nd table, etc. When a new player joins the chain, they take a seat at the last table or 3rd table in this example. If someone leaves the main game, the player at the top of the list (who has been at the 2nd table longest) is moved to the main table. Then the person who has been at the 3rd table the longest must move to the 2nd table.

People can't move from one table to the other as it is controlled by the "who has been at the table longest" list. If someone doesn't like the main game, usually bad players go bust before making it to the main game, they have to leave the main game (change limits or cash-out and railbird) then get back on the list and wait for a seat at the beginning of the chain at the 3rd table.