I believe that posting on this forum, in part for commercial purposes, is fine and is as it should be. It should be part of the reason for the forum- to promote violin making on every level. Many, if not most, participants in the forum are here to some degree to help in promoting themselves and their work, including myself and Jeffrey. Marketing/promotion is one of the key ingredients to business success, and the Maestronet forums provide an opportunity for that, as well as a place for sharing ideas and solutions among professionals, amateurs, and the curious.
I think the decision to remove Manfio's thread is wrong. Such threads, while definitely self-promoting, also are what many viewers want to see and learn from. It's not like they (the threads) are too frequent or 'stay at the top' too long. In other words, I feel they do more good than they do harm- if garnering a little self-promotion can be considered harm.
I would be in favor of a re-consideration- and thanks, Jeffrey, for doing the difficult and oftentimes thankless job you do.