Compare with the comment I saw somewhere with this dilemma:

(a) Let the aliens that happen to visit us cure cancer, except for 1 random patient out of 100, that they will let die, then eat. (b) Just let the aliens go, never to be heard of again.

Let die? As in wait until they die by natural(ish) causes then eat the corpse? This sounds like a no-brainer. (Cryonicists might have some concerns about the meaning of death, however. Hopefully the patients agree that they are dead at the time!)