Ok so 3,5 days later I can officially confirm that under the current market condition the conversion is profitable!

As you can see in the above picture the 81.257 SBD which I got in exchange for 100 STEEM in the internal market were converted to 91.863+14.772 = 106.635 STEEM, a yield of 6.635% for 3.5 days which gives of course a homoungous APR if you compound the interest.

And of course because I'm not shy of doing maths, I "tripled down" as the SBD is quoted $0.94 on Bittrex

Bought SBD in the internal market for 300 STEEM and launched immediately their conversion - I expect 318 STEEM in 3.5 days.

That's an easy $1800 the day STEEM will be $100 ;-)