Do you think there is profit potential for niche market social networking websites?

[Adsense$$$Maker]

It depends on how much services you can provide. How many sponsors can you get for your site. My sites are sponsored by advertisements and so is myspace. The most simple with no outlay method is to create your own websites or blogs @ blogger.com and put up your products' photos and services if you have any. If you can create websites or blogs and can type, you can make online money online easily. You may make money by publishing Google Adsense on your websites. If you have a website or a web-blog, you could make money by publishing advertisements on your site (by google). If someone clicks on those ads, you will earn money. If you don't have a website, you may start creating web-blogs like blogger.com (mostly free) with advertisements (google ads) on it. Some free websites don't allow you to publish google adsense because they are doing it themself.

Like this jobless woman here. I believe she will make it
eg: http://lost-newbie.blogspot.com/