You can already clone people's organs. You could probably sell cloned blood to both the neutral medical clinics and to the Sanguinarian Society, for one.

[Nelliel walks in and takes alook around. She'll never believe that he's been entirely discouraged from scientific study, but she can believe that his experience with SERO was frustrating, and that not being able to use his intelligence to adapt to new circumstances would be even more so.]

Helping others with their abilities would give you the chance to study them in a legally acceptable way, and a source of income. So there is that as well.