FATEs at 80 -

[CazzT]

Perhaps if there was a gil bonus, or more gemstones per FATE, it would be more worth doing.

Gil, maybe, but doubtful. Gemstones, zero incentive, for the reason I pointed out. What good are the gemstones to me when I have nothing worth spending them on? Gil would have to be massively boosted for me to take time out of my list of other activities to do Fates once I've completed the Ranks and leveling up.