In my opinion, a Social Media Networking Site is one that a person joins for social interaction, is all about you, your friends and family and is fun--no responsibilities beyond the usual rules.
To me, Eden is a retail site that has set itself apart by adding item reviews so purchasers are aware of the products characteristics, capabilities and lack of as well as get a basic idea if the item is suitable for them or not. Then they took it to an even higher level of service and added the point program, affiliate program, videos etc., etc. Eden then went platinum and added the forum and social aspects to help communication, answer questions and to promote social interaction and an amazing community was built!!
BUT---there are responsibilities on the site. You earn products and are paid products and possibly cash in trade for your input and work and responsibility.....Mak e sense?????
Anyway, I did vote for EF since I really do not like the other sites.