I notice how you say hundereds of Woesels is just a money sink. Not so! In fact, if you have enough Woesels to draw the Woeseller card, then the option that sells one of your Woesels is actually one of the best Moon-Pearl grinds in the game! There is nothing you need that many Moon-Pearls for, except Determined Illuminator, a vanity grind for sensible people, but you never know when you might need a hundred thousand Moon-Pearls on short notice.