One possible reason the market hasn't been locked up is mentioned in the article. Each of the services he tried had a different type of members. I think if the

One possible reason the market hasn't been locked up is mentioned in the article. Each of the services he tried had a different type of members. I think if there's an opportunity it's not one of one-service-conquers-all. Small niche dating services may be more effective. The main advantage is that members start with things in common, depending on the niche. A disadvantage is that unless the gender mix is fairly even it will die. However, you could combine different, but compatible, communities.