STEEM is not the same as shares in Steemit, Inc.
Steemit, Inc is a for-profit organization which is obligated to serve its shareholders (of which I am not one). Anything Steemit, Inc does is for its benefit and legally speaking, they cannot promise in any legally binding way to do anything for STEEM or risk Steem being interpreted as a security.
I think I understand what you mean. Can steemit.inc use the Steem in the Steemit account to invest in EOS? Could they then choose to sharedrop EOS on Steemit accounts or use the EOS to fund a migration?