This is the fundamental limitation of FE scripts. They can manipulate what you see, but they cannot easily manipulate what the game knows .
If the game developer has not secured their RemoteEvents properly (e.g., checking if the player actually has a stone to sell, or capping the maximum value), the server might accept the manipulated data and grant the player millions. This is not a universal "Infinite Money Script"; it is a specific exploit tailored to that specific game's code. - FE - Infinite Money Script
Modern FE games use "Remote Events" to tell the server what you are doing. A sophisticated script injects a fake Remote Event claiming you just defeated a boss that drops $1,000,000. This is the fundamental limitation of FE scripts