wow.ets.modules/modules/commands/set-xp-rate/README.md

Set XP Rate Command

This will allow players to use their chat window to set a custom xp rate with a limit. This allows individual players to either choose to enjoy the store or get to the end game content.

Configuration:

MAX_XP_RATE: number - defaults to 5

Chat commands

#xprate show - displays players current xp rate
#xprate set [number] - sets the players xp growth rate 

Demo