I still don't think that he started the site with intention to scam. (Yes, I realize the people who get scammed usually rationalize just like this.. "I trusted the site and I'm too smart to get scammed, so it cannot possibly have been a scam."

) The site was quite weak from technical point of view with slow payouts, timeouts with bets... Seemed like it required lot of manual work, but it seemed like he was trying to make it work. The investment feature was great and I think there was potential for "just-dice"-like growth with that feature. I did two investments on the site: 1 btc that was paid back in October and 10 btc that has been unpaid since early November.
It's possible he just lost the btc in October/November somehow; there certainly were a lot of opportunities to lose btc during that time. Assuming he really lost the coins somewhere he should have just been honest and open about it, instead of coming up with nonsensical explanation of technical problems and continuing to pay random small investments and bets. Maybe he hoped someone would lose a big bet on the site. If he wants to continue the site without being accused of scamming and grow the site, he just needs to do normal "Chapter 11"-like deals about payment schedules and try negotiate to his debts down.
After removing the link to the thread from the site and finally closing the thread here (just before major sport betting events) while not answering pm:s or emails, it does look like he has finally changed the sites business model to full scamming.