Clean Slate Glitch?

Seriously though. It's essentially a 500m+ price tag for a 9x% clean slate scroll. Big deal...

If you're really intent on landing an extra 30%, you'll likely be paying somewhere near max mesos, and there's still a significant chance to nuke the item with the 30% (plus the more negligible chance for the slate to break it). And if you wanted to be safe and not take chances with breaking, you'd be forced to use a 10%, meaning spending upwards of 5b mesos to land one scroll.

Well, think about the difference in price between a weapon with +30 attack (average +6 30%), like an 80 att Sleve, and a weapon with +40 attack (an 85 att Sleve). It's pretty fucking huge, especially with claws, bows, 1h and 2h swords, and ELE WANDS OH GOD.