Equalize EXP/reward rates for leveling methods?

[Asiaine]

fate has nothing to do with GC as well, why does fate reward seal?

I could be wrong, but I believe FATEs are 'protecting' the realm from aggressive monsters/beasts/people. And protecting the realm is one of the tasks of the Grand Company. Since you are doing this as part of the Grand Company you get compensated.

Invading dungeons without the request of the Grand Company, has nothing to do with them, so there is no need to be rewarded.