@shushila: I do not think that "second payment" means second payment of particular member. By "second payment", he means that he will pay the next payment after 3 months. He has made only one payment by this time.
There is another reason for believing that the "second payment" means the second payment of the site itself because it is profit sharing site and so when he makes payment to one member, he has to make it to all other qualifying members.