According to the eos website..
during the entire EOS Token distribution period, block.one will not do any of the following: block.one will not purchase EOS Tokens by any means; block.one will not pay any dividends to its shareholders; and block.one will not perform any share buybacks. block.one intends to engage an independent third party auditor who will release an independent audit report providing further assurances that block.one has not purchased EOS Tokens during the EOS Token distribution period or traded EOS Tokens (including using proceeds from the EOS Token distribution for these purposes). This report will be made available to the public on the eos.io website.
However, they have been sending a lot of ETH around already with large amounts going on to the exchanges. Why would they do this? I can understand moving on to cold storage.. BUT, that is not what is happening. Here is evidence of a 40k ETH transaction going to Bitfinex:
https://etherscan.io/address/0x9937dbb2128b55c44d8af7bf36fd76796a814cf4#internaltx
So, what do you think they are doing?