Power-leveling is absolutely BROKEN

[Sephrick]

Not sure where you pulled the 800k from.
Camp repop rate is once every min. For a single puller in a camp with 8 mobs, the max you can get is only around 240-300k. (4-5k per pull x 60 = 240-300) And this will decrease as you level up.
It is more likely to do a full clear of the mobs once every 2 min, so rates are about 120-150k/hour.

-> Still a lot but nowhere near 800k/hour.

Welcome to the XIV forums, where hyperbole is stated as fact.