Complex sentence: Different policy banks would offer different rates, though a payoff of 600 to 1 was typical; since the odds of winning were more like 1:1,000, the expected profit for racketeers was enormous.
Split into simpler sentences: Different policy banks would offer different rates, though a payoff of 600 to 1 was typical. Since the odds of winning were more like 1:1,000, the expected profit for racketeers was enormous.