Everyone who has completed it has reported around 800ish fates. That seems to the average. Not 1000+

Still. It was a tough but they gave people 2 months and you could use it to level other jobs and work towards the fate achievements in your log. Some fates even give items for beastman tribes for free materia you can trade it. Plus all the gc points.

Im not saying I would want it again - but you if you are smart, you could make it be very beneficial.