AddMeFast is not a social site, its a social promotion website. You need SEO service for this type of website.
You can promote your social exchange site through various internet forums and also promote your site on other social media exchanges. I think press release is the best way . I got 300+ register members through single press release My site is http://socialexchangesite.com
I don't know if SEO works well for this type of site. What keywords should i target more exactly with SEO? I will try with Press Releases to see what i do. What do you think about my website too? http://www.getsocialpromotion.com/
These kind of websites are hard to br promoted today because there are authority sites in this niche! Manual promotion is your best bet i think!
2 BIG TIPS that i will give you, and if you follow this correctly, you will get tons of traffic to your website for FREE. You want it? Ok let me be brief: give value to this type of forum (digital forum), place signature that's not spammy with your link in it, make sure you get along with the rules be a part of facebook groups, talk to them, make friends with them, comment or post stuff with them... what kind of facebook group? Of course online marketing group. You can simply find them inside the facebook platform ... they're everywhere and they're literally everywhere. =)
One way to promote a Social Exchange site is by joining various Groups on Facebook and getting your site out there for others to explore and eventually like. You may also tap other social media sites, like Twitter or Instagram, to promote your site.
For the promotion of social exchange site video can be a good choice. This should be something really catchy and it should contain all the features of your site. Don't forget to launch your seo campaign for promotion. You should be ready and quick enough to answer such types of questions,like why should I register on this site etc?