I thought OP raised some good points.  In addition, as a non-mined system, OpenCoin costs much less to run.  Bitcoin costs $150,000 in electricity per day just to keep it secure.  Less cost for OpenCoin means more profits.

Also, I read that Satoshi could profit enormously from Bitcoin as well.  His share of Bitcoins has been estimated at 1 million coins.  That's not chicken feed.

Finally, by putting a business-like appearance and accountability on their currency, OpenCoin can easily score a better reputation than Bitcoin with the general public, which is not interested in experimental currencies or in buying drugs on Silk Road etc.