The donation process was exactly as described in
but I was given only local anesthesia. The marrow was withdrawn from one of the two protrusions of my pelvis about 2-3 inches away from my spine (basically the very top of my butt). The process is certainly a strange feeling, but it's tame--not donating a kidney or anything.
It's a good opportunity to practice deep breathing and relaxation while focusing on the wonders of the human body.
The page you link to clearly says: "Donors never pay for donating, and are never paid to donate."
Is your story missing something?
Yes, I should have noted that I was donating as a paid research subject and not specifically to a marrow bank or to an individual who needed a transplant.
I commented to explain that the marrow-withdrawal process itself is nothing to be concerned about, actually involving less discomfort than donating blood.