It's simple - she's sexually attractive, and young men are more likely to be sexually frustrated enough to donate marrow in the hope that she'll so grateful that she fucks them. Why else would they have a whole gallery of pictures of her looking winsome? Why is she front (web)page news when tens of thousands of patients in similar circumstances aren't?

Don't get me wrong - this isn't criticism. It's a clever, and potentially life-saving, angle.

 Before you judge me, I registered as a bone marrow donor at university. Sadly, my lucky number hasn't come up yet.