Poilievre embezzling money from the 70,000 members

Due to the fact that 500 new members purchased memberships with prepaid credit cards from Patrick Brown’s website, he was disqualified from the leadership race. The number of new memberships he sold exceeded 150,000. Could you please tell me how he is supposed to keep track of the amount of new members who are using prepaid credit cards?

Throughout the campaign, there was no mention of Poilievre embezzling money from the 70,000 members who already registered.