Stand-along community vs communities within social networks

I thought here, looking at, say, Kombi : why do we need to create a social network, then to form communities there?



After all, the question immediately arises - where the money? Adsense-like? For the Russian-speaking audience - it is doubtful. Of course, a runner can talk about $ 1.5, but this is a penny, and even these numbers confuse me ...



The only viable approach, IMHO, is to form a homogeneous community on a separate site based on the relationship to a certain subject area, and introducing an existing (or creating, which is also an option) niche brand.

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In this case, such an approach is, firstly, cheaper, and secondly, content is controlled better than in social networks (why is a separate huge topic). Thirdly, there is such an effect - if the site is “only about it”, then it causes more interest among fans of “this” than the site, which “is about that too”. In general - time, of course, will show, but logic is a great thing. :))