What your saying doesnt make sense lol. You have to grind for equips and stones around 65-70 anyway to actually be viable for end game and PvP. Theres really no other way to build resources as F2P early on(1-65) unless you cash and sell what you get to buy stones off the AH. That being said why would you then want to slow the leveling process for players who are trying to reach the end game grind?
You can sell drops to NPCs to slowly build up zeni to buy extra stones off AH.