Those 8 factors all people share might well be true, but they are missing (or are very abstract versions of) various motivations that make educators tick: enhancing professional reputation, the egalitarian spirit of sharing, network building (in the connectivism sense), etc.

For that audience, postmodern has different connotations, perhaps not as negative but possibly confusing. I, for instance, associate postmodernism with a relatively particular set of assumptions and ideas that are part of post-structuralism.

I suspect personal branding is an idea that takes some radically different shapes depending on the context.