With mine I think that there are plenty of sites about for game consoles but that the majority of them just turn into big adverts. I wanted to start a forum where people could just talk about games without that "oh no, the corporate sponsor don't like that so it must be censored" vibe.
I wouldn't consider it because I've actually done it and still do it for near on 4-5 years and helped, contributed to other forums over my own. Why? I can only guess that I prefer it and it saves me maintaining my own forum. It's easier for me to post and contribute to other forums knowing once I've posted I haven't the worry to maintain styles, update and continuously post content on my own. I suppose I can post at leisure on other forums where on my own I'd need to post content which then doesn't feel like a hobby but more work related.
That said, Sometime in the next 6 months I'll get my forum opened and see where that leads. I'll most probably get bored with it again.
Bringing a massive audience together. Using the collective power of that community to build relationships with other large communities.
Take those relationships, package them under independent agreements, and you have a functioning network with community leaders and an audience that rivals the largest networks on the internet.
This is when you have options; development, advertising, and capital.
I'm so against purchasing communities. Curse, ZAM, Crowdgather; all the big forum networks buy out popular forums and crap all over it. Never give up your independent control. Build relationships instead.