to calculate the initial vote value I used regression analysis @crokkon.  I have the actual vote worth of Dtube on a number of dates, coupled with their SP levels and coinmarketcap data.  So I used regression to work back the value of a vote based on 2M SP at the date of delegation.  As there is a correlation between the value of a vote and the price of STEEM, regression can be used to work back.

As for your question on SBD, I do not know.  Having read the whitepaper I cant see this, but as mentioned this whitepaper was written for developers and my lack of code knowledge means I may have missed some information.

When it comes to SMTs I also have more questions than answers, and as a small but profitable website owner, with so many unanswered questions and the level of difficulty in understanding what has been presented to us, I don't see me even considering implementing an SMT to my community of over 50K people.  Part of the reason for this analysis was to try and get my own head around some of the aspects.