Is it worth regularly publishing in unknown business & management journals?
For someone who already has a solid academic record publishing in non-traditional, but more visible, venues can be a way to get some recognition in the wider world - outside academia. But I doubt that it has a lot of effect on the things that lead to an academic reputation.
Even in other fields, there are &quot;public scholars&quot; who spend time and effort on making the results of research known to non-academics whose practice might benefit from it. Think of it as a public service, not an academic reputation builder.
In physics, for example, Carl Sagan was such a public scholar, even though he had a solid academic reputation as well. In fact, it was that academic reputation that gave him credibility in the larger world.
For a young scholar, however, it may mean less.