http://www.japanluv.com
2. Chemistry.com
http://www.chemistry.com
3. Match
http://www.match.com
4. Lavalife
http://www.lavalife.com
5. LifetimeSoulmates.com
http://www.lifetimesoulmates.com
6. FriendFinder.com
http://www.friendfinder.com
7. Perfectmatch.com
http://www.perfectmatch.com
8. eHarmony
http://www.eharmony.com
9. Matchmaker
http://www.matchmaker.com
10. American Singles
http://www.americansingles.com