Keep in mind, those sites are pre-established. In the case of AllDeaf - that's a general purpose, worldwide site. It's not restricted to a singular country or ideal, or niche.
A small, local niche site is hard enough. But when you mix a niche topic, with a niche local subject - it's just twice as hard as just starting out. Especially with the point that I made. All these factors add up to challenges for you. I'm not saying it's impossible, I'm just saying it's 10x's harder than just building a niche topic.
COD4Boards is now
www.thecodforums.com The previous owner did exactly what you advised the OP to do... It worked for a while, and then it exploded from there. But that explosion only worked because COD4 was a hot topic once the game was released. As years goes on, the site got so popular, the owner had to sell it because the growth was too much to keep up with.
AE? What abbreviation does that mean? One of the sites that are in that listing is moi's.