Agree, but I don't think it necessarily has to be that way. All of these social sites have a core competency/use case, but once they start tacking on features

Agree, but I don't think it necessarily has to be that way. All of these social sites have a core competency/use case, but once they start tacking on features as an effect of the profit motive, it starts to dilute the experience. Working on my own site and planning to keep it strictly focused on the core value prop.