There are some platforms already for this. I, unfortunately, am on Twitter, but that's only because I can't seemingly find other methods in which to consume the news I care about, (though that could change with the advent of the IndieWeb), and some people only know me up there. There is a concept in the IndieWeb called POSSE (post on own site, syndicate elsewhere), which means that you begin on your own site, so, bringing people to your own domain is not spam.