Not quite one year to the day it was announced, Seth Godin is shutting The Domino Project down, offering the awkward explanation that “it was a project, not a lifelong commitment to being a publisher of books,” instead of, perhaps, admitting that publishing is harder than it looks if you want to swim at the deep end of the trade pool in the middle of a dramatic transition, as he obliquely acknowledges in many of his noteworthy takeaways.