I believe that they dont want to take sbd as steem is the recognised price per share and this is directly linked to sp.

As for your shares take a look at this spread sheet. It is updated regularly.

https://docs.google.com/spreadsheets/d/e/2PACX-1vRhhnY8couo1lPKsOBLvwS1hfvVAlB6SrhAHWiM3qXOVep_AUenh97SyPAsMCBWH26HgCOrclNl31BZ/pubhtml#