Hello,
In sandbox single player in 1.08b, when a AI faction demands gildars and threatens to attack me, if I select the option to give them the gold, it does not actually remove the gold from my inventory (as displayed on the top of the screen). They don't declare war either. I don't know if the AI player gets the gold in his inventory or not. But for my faction, the option the option to give the gold have no effect at all.
Also, it may be related, the AI player sometimes demands I give him more gold than I actually have in my inventory. Again, no effect if I agree.
Guillaume