I am not aware these niche, almost I am not heard about these website before the reading this post. But I think I am confused that there is no need for niche social networking website, because your friends on any social networking website is the same interest to you. so why one one use these website instead the famous Facebook, twitter, linked.
Use them to meet new people in your sphere of interest to expand your network of friends, colleagues, and contacts.
Niche social networks can be more beneficial as compared to general social networking platforms, as they allow you to focus on the important part of the subject of your niche, and it enables you to gain total expertise in your niche, while social network which are in general used for general niches or multi-niche networks like Facebook allow you to gain exposure to the topics world wide, both have their own peculiarities, it might be more beneficial to obtain a link from related niche social platforms as it will give a potential boost to your site to get on the top of the rankings, thanks for the share guys sites noted down