As far as I can tell, doog would have made (by today's BTC market rate) over $1m in commission from JD - I doubt he's in a huge rush to sell just yet.
Since the site was already back to zero by October 5th, and by November 19th 1BTC= $600, so todays BTC market rate essentially applies.
Given 10% of final profit of 19,098.09848411 that would be over a million less any operational expenses. It's possible he made more since the cold wallet still has 10K in it, and the amount invested is roughly 5.5K.
But either way I wouldn't sell code at this point, unless someone was paying over 5000 BTC.
Personally, I would use 1.4% as the house edge, since that is the HE of pass line in craps. I think that 1% has to much volatility, and since you can't do better than 1.4% at a casino, just start there.
I also think the bankroll at roughly 50K was about twice as big as necessary for the game. There doesn't seem to be a market for gambling at MaxProfit of 250 BTC, so a smaller investor pool would be a richer and happier investment pool. You could auction off the right to invest, but perhaps it would be better to create another investment concept.