1st: Propably you have not yet set any activity in the Social Network. As long as you haven’t edited anything on your individual profile, your profile is not viewable for others. If one sorts all members alphabetically, you might see all members. If you sort the list through “Last Active”, you would not see any member who has not yet done anything in his profile. – Therefore. – If you want to be seen by others, become active.
2nd: Maybe you have not set your Profile Privacy to “yes”
Go-to: My-Profile > Settings > Profile Privacy — set the first topic “List in members directory” to “yes”.