Wrote about SBD peg half-serious half-joking here.
SBD pegged to 1 USD from south as one can always convert SBD to 1$ worth of STEEM, then trade them for SBD on market exchange, rinse, repeat.
From north SBD pegged long-term as with greater price comes greater inflation. There were only 2.8M of SBD in november and 6+M now.
I'm for an anarchic approach. If someone willing to pay more than 1$ for 1 SBD let him. You could consider such a trade as a donation to a platform and its authors.