I don't even sell them, I send them to camp in case the game someday decides to let me cast
remove curse on them.

Same. I'm glad that Karlach fans got a companion they liked but I'm not one of them. Karlach's attitude towards soul coins is pretty heartless and disagreeing with her - she brings up twice - results in a big reduction in approval with her. I end up having better relations with the lawful evil Gith warrior and the chaotic evil thief.