Ultimately, Jarecki's highly publicized successes caused the industry to undertake a complete overhaul and digitization of their roulette tables. Nothing he did was illegal, but it was annoying and costly to the gambling industry. By the end of 1969, Jarecki had made almost $8,000,000 in today's dollars. The results were a net profit of £625,000 (roughly $6,700,000 today). Then he did what any entrepreneur does when ready to take a risk: He borrowed £25,000 from a private investor, and over six months he quietly, slowly and cautiously placed his bets.

He spent days and nights analyzing that data. He hired people to help him log the data. Jarecki visited numerous casinos in Europe. 'If numbers 1, 2 and 3 won the last 3 rounds, what was most likely to win the next 3.' 'I until I had a rough outline of a system based on the previous winning numbers,' he told the Sydney Morning Herald in 1969. He spent countless hours in numerous casinos, in addition to the hours he spent at his job, manually tracking tens of thousands of spins and analyzing the data for abnormalities. These tiny defects - 'chips, dents, scratches, unlevel surfaces - might cause certain wheels to land on certain numbers more frequently than randomicity prescribed.' According to this great story in The Hustle, Jarecki found that roulette wheels, like all other mechanical devices, demonstrated wear and tear after a period of time.

and then painstakingly working at exploiting it.

Biggest roulette wins