Um no.  There's nothing legit about anyone involved.

David may have been naive (in the beginning) but it's clear that he became complicit fairly early on - quite possibly long before the logs.  Gekko, Bob, and Steven were never interested in the coin, but only in extracting initial BTCs and then, down the road, even more BTCs by selling off their huge coin stash itself - they just ramped up the timetable after they felt they were getting screwed in the deal.  And Lin was the facilitator of the entire thing since he could use the illusion of being a disinterested 3rd party holding the escrow.

The hilariously ironic result is that this is yet another example of why 3rd party escrow is not a viable solution (even if there is a level of transparency) - which is exactly what David has been marketing, though not completing unfortunately, in Halo.  In actuality, I think that was worth every penny - the best argument for this particular solution, came from the players claiming to be providing it (due to them being even more crooked than the market's users were likely to ever be).