Are you legit?

this is all i could find regarding exploits, wouldn't this make buying, say, duped WS from people something accepted, since technically everyone has access to them, so it doesn't really provide any competitive advantage. and the only one at fault would be the main duper who IS getting a competitive advantage by materializing them from nowhere?

One could easily regard benefiting from an exploit as exploiting the exploit.

But, yeah, that was the closest I could get to an example of something that would almost universally be considered "illegit" without being strictly addressed in the Terms.

Does this count as a definition?

It counts as a generic definition, yes, but it hardly applies to Maple.

For example, as that article itself addresses, Maple has a system that divvies experience to players proportionally based on damage done, so it's not an "all or nothing" system as is addressed in the Wiki article you linked.