The article quotes "for about a year" and the bet of 200K USD on Jan 2, profiting Feb 6 with 17.5M USD, which I understand as: if they had to do it every two months, they had to invest 1.2M USD in one year before they won 17.5M. Still not bad. Of course, the options they get wouldn't have to give them the same win every time they invest 200K though.