You paid someone to tell you and XP is an exponential function of Level? Every game since D&D in 1974 (and probably earlier) has had that.
Heck, the human ear has an exponential relationship between air pressure and perceived loudness. As does the human eye for light and perceived brightness.
Haha, no. I did not pay someone to do that. I paid someone to find out how much of these economies are copied. We had numbers for everything including cost of unit per level, earn rate per minute per level, etc.
Everything followed the same pattern, not just level and XP.
Heck, the human ear has an exponential relationship between air pressure and perceived loudness. As does the human eye for light and perceived brightness.