The Well of Misery is a blessing upon the land that enriches the economies of all nations. The extra gem income for Ulm is simply a lucky coincidence
C'tis speaks of locking away in Tartarus, yet he has opened its gates and enslaved the dead gods within to serve his empire.
We shall refrain from doing "nasty things" upon C'tis until the form of his opposition materializes. Depending the outcome and egregiousness of his actions our response may be either relatively benign or of such fury that the immortal soul of holy Sssla is not simply locked away in Tartarus, but held until his mind is shattered and remains subsequently released from the gate to serve as a thrall to Ulm.