Question regarding Soulbound characters and the Redemption quest

[IraMorti]

So I know from previous conversations on the matter on the forums that the Redemption quest ends up a dead end for Soulbound characters, but is there any side benefit, 2nd place prize as it were, to get from it for Soulbound characters outside of enjoying the demon sex while it lasts? Does parts of the quest benefit other characters or maybe allow you to get something unique?

Basically is there any point to starting that quest as a Soulbound from a meta perspective?

 

[Punccline]

If memory serves, once you're soulbound you have to actually tell Kass in her palace or she won't notice (since the gods gave you a very convincing decoy soul). Telling her sets your relationship from Romantic to Hostile.

I would assume that if you don't tell her, then at some point in the story she's going to want your soul and go "Hey wait where the fuck did it go", leading to a betrayal scene. No idea, though.