I like your arguments, but TTG most succesfull game may have been TOMI. If we judge the attention the game has garnered by the forum post, TOMI is the 2nd most active forum besides offtopic.
I thing TTG must have made a profit out of it, unless the voice actors killed the budged with their nonsense demands. We must remember how hard it was to recruit Earl Boen out of retirement.
TTG continues to grow by making small market games, and yet theres no 2nd sequel of TOMI. I believe the problem doesnt lies in TTG, but in Lucas Arts, and i believe they must have made profit, but just not in the way their franchise Star Wars does.
The diverted money to make Star Wars using the kinect and that game is being trashed out by gaming sites and reviews are coming in bad fast. I wish they give more chance to the adventure genre like Monkey Island and give it a deserving ending.