Police in the Chinese gambling enclave of Macau have busted a major prostitution ring and arrested more than 100 people, including the nephew of gaming tycoon Stanley Ho, city authorities said Tuesday. The syndicate sourced prostitutes online, mostly from mainland China, to solicit at a Macau hotel, turning an estimated annual profit of $50 million, Vong Chi-hong, spokesman for the city’s Judiciary Police told AFP. It is the largest prostitution syndicate to be broken up since the former Portuguese colony was returned to China in 1999, “both in terms of money involved and number of prostitutes”, he said. Vong said prostitutes had to pay a $24,200 membership fee to join the group and were allowed to solicit at a hotel after paying a monthly fee. Alan Ho, a nephew of casino tycoon Stanley, was arrested with several other alleged ringleaders and 96 prostitutes in a raid on Saturday, a government source confirmed. A photograph in the South China Morning Post showed him handcuffed and being led away by police.