Sometimes it happens that you have made all the money in the world after a hectic period of years. And by his definition "CTO" and "Chief Architect" perfectly fill in those roles .Anything more than that becomes delta. So you now decide to keep yourself busy in a less stressful job, for little money. And then do whatever you want to do, as you have all the money in the world to back you up. You can fail, get fired or go on long vacations without worrying much about your employment.