I think there's an opportunity here. Let's be supportive and provide honest and constructive feedback about the product and the ecosystem they are trying to create (or just ignore them if you want; that probably works, too).
If the project is successful, then it's a vital "reality check" for those of us who didn't think that a copycat DAC could get off the ground without honoring the social consensus. And hey, the guy did say he's going to add some new features to the code; maybe he ends up producing something that can be applied to BTS. At least he won't have any grounds to complain if/when his enhancements get copied over to the BTS codebase (:
But if OmniBazaar fails, then what better evidence of the virtues of the social consensus could you ask for than a project that was doomed from the start – despite all of the encouragement (or at least professional courtesy) from the BTS community – simply because the developers didn't honor the social consensus? That all other things being equal, not honoring the social consensus is an Achilles Heel?