1. This was before the the DAO was even launched by a 3rd party. 2. Can't blame the guy for cashing in a bit, wouldn't you? (and just 25%, still keeping 75%) 3. and he also donated a good portion of it to charity.
https://soundcloud.com/cryptoafterdark/episode-9-vitalik-but...
https://www.reddit.com/r/ethereum/comments/4g9n2a/crypto_aft...