Several of the previous posts about @burnpost have stated the following
In no case will any coins from the account ever be sold, transferred, or powered down except to @null. Any value in the account can be considered as irrevocably allocated for burning either immediately or a some time in the future.
The bolded portion is unclear and in fact inaccurate, as SBD "coins" have always been sold (in order to buy STEEM). The intent has been that no STEEM coins will be sold (only kept within the account until eventually burned). When voting for @burnpost, voters can be confident that STEEM will never be sold by the account, only bought. Part of the idea of @burnpost is to leverage rewards to buy-and-burn STEEM, in order to increase its price and benefit all STEEM holders.
All rewards from this post will be sent to @burnpost as a donation which will then be traded from SBD to STEEM, powered up, and/or burned in accordance with the usual @burnpost rules. That includes SP which will be immediately sent in the form of STEEM from my own account