I'm not at that level, but they have lower level FATES that work very similar to this and people do the same thing. It's not an exploit, IMO. It's smart. Pretty much the only efficient way to level up your other classes is with FATES. Dungeons give crap for exp, Guildhests and leves give crap for exp and they are limited, hunting log you run out of quickly. So FATES are the way to go, sadly. And these are a good way to get that extra bit.

Not an exploit, IMO.