There is also the option to convert SBD to Steem. When doing so the SBD is destroyed and taken out from the market. When performing this action DVD is valued at 1$ of Steem.
So if SBD would value 1$ on markets to this would be the way to convert it into Steem. But because of higher prices the system is currently broken to some point.
RE: How Steemit Payouts Work - A Beginners Guide