Seet Seo Boon, who was also treasurer of the syndicate, was fined S$620,000 as well. The 57-year-old Singaporean has to serve 310 more days behind bars if he does not pay the fine by next month.

Seet was one of the key figures behind the syndicate which he started in 2011 with his two older brothers — Seet Seow Huat, 64, and Seet Sian Thiam, 72. They collected weekly revenue of at least S$1 million.

Using two main websites, the syndicate collected 4D and Toto lottery bets and earned more than S$100 million in revenue before they were nabbed.