I'm not sure. Unlike other millionaires and billionaires (lot of them donate money), Bill is actually working directly on the fields and giving almost all his time to improving Health and Education in the world. That's something big and I really appreciate him for that. Had he been 'only' giving money, I wouldn't be moved much.

For all you know, zuck and Travis will do the same in future.

Not sure if you know how many companies and lives, gates made bankrupt with his shady business practices. No different from Travis here.