Use these for UI-based purchases (like a "Double Cash" gamepass) to ensure the server handles the math, preventing players from using "Cheat Engine" to change their local money values.
A rack where players can "Buy" tools (swords, guns, grenades). Use Instance.new("Tool") or clone items from ServerStorage into the player's Backpack .
Standard tycoons use a "Touch" event. For a 2-player setup, you want the button to check if either player in the duo has enough money.