Well, what I got was a ride in the cockpit while talking on the radio (pre 9/11, obviously), a bag full of little airline alcohol bottles, and thank yous from the FAs and pilots.
I was helping a guy with what seemed quite clearly to be a kidney stone. I'm a specialist in a very specialized field, so my general medicine is not all that automatic. I wasn't absolutely, 100% certain. Ruptured aortic aneurysm would be pretty unlikely in a 30-year-old.
They asked me whether they should divert, and I said, "I'm not qualified to make a decision as to whether an airplane should divert." They patched me though on the radio to a central airline medical service (hence the cockpit). I described the symptoms and my thoughts to the MD on the radio, and he made the decision that we did not need to divert.
I guess the only thanks I would hope for is not to be sued. If I had had to make the decision, I would have said to divert in order to cover my a$$.