If you look at the outgoing transactions from the EOS crowdsale there are 180k ETH so far sent to wallets, majority of which are then sent to Bitfinex. Can't tell whether they're selling ETH or buying EOS.
https://etherscan.io/address/0x9937dbb2128b55c44d8af7bf36fd76796a814cf4#internaltx
Would have thought they were more likely to be cashing in $45million worth of ETH than bothering trying to support their own coin.
Maybe they had an agreement with Bitfinex to sell the ETH on their exchange if they listed EOS, was listed there as soon as the first distribution ended.