IIRC, there was an article on HN a few months back about how she's given away tons and tons of money, more than anyone into her family. She seemed to be a good person in her interview, but I can't find the link.
I believe this is the thread/article in question. [0] (sorry for the low-content post, just recalled a fragment of the title and figured I could help.)
[0]https://news.ycombinator.com/item?id=19524325