c'mon now, really?
When you're wandering around the Wheloon Prison wilderness area, there's the "Natives" that you can talk to to leave the area. It's basically the same thing as freeing slaves in underdark or House of Broken Chains.
Except there's the option to "Donate 6 Astral Shards" to free them...
and it's the First dialog option.
How much money do you think is going to be lost by misclicks or not reading the dialog?
Paying for the convenience should be the characters LAST resort, not their default, go to, first option....