As I noted elsewhere the DAO is getting 1596 SBD per day (using your numbers) but the other sources of inflation (vesting, witness, and author and curator rewards) are producing 9x as much STEEM. So under the optimistic assumption of an unchanging STEEM price, this process pushes the 'debt ratio' toward 10% (so under current conditions, lower).

In terms of the amount of SBD:

1. @sbdpotato isn't the only only one doing conversions. It is adding to the conversions being done by others.
2. It will take a while for @sbdpotato to accumulate a large enough fund to convert at a high rate but with persistence it is possible. Every day's rewards add to the fund.

BTW, I'm downvoting this, as I feel the reward is a bit high for something that asks, essentially, if rewards of @sbdpotato are high enough, not even making any sort of case that @sbdpotato is a bad or harmful idea, just not big enough. Then gets more rewards than the typical @sbdpotato post...