Independent off-track bookmakers typically have a smaller take and thus offer better payoffs, but they are illegal in some countries. However, the introduction of Internet gambling led to "rebate shops". These off-shore betting shops promise to return some percentage of every bet made to the bettor. They may reduce their take from 15–18% to as little as 1–2%, while still generating a profit by operating with minimal overhead. Parimutuel bet types There may be several different types of bets, in which case each type of bet has its own pool. The basic bets involve predicting the order of finish for a single participant, as follows: North America In Canada and the United States, the most common types of bet on horse races include: Single race Win: to succeed the bettor must pick the horse that wins the race. Place: the bettor must pick a horse that finishes either first or second. Show: the bettor must pick a horse that finishes first, second or third. Across the board: the bettor places three separate bets to win, place or show. Exacta, perfecta, or exactor: the bettor must pick the two horses that finish first and second, in the exact order. Trifecta or triactor: the bettor must pick the three horses that finish first, second, and third, in the exact order. Superfecta: the bettor must pick the four horses that finish first, second, third and fourth, in the exact order. Box: a box can be placed around exotic betting types such as exacta, trifecta or superfecta bets. This places a bet for all permutations of the numbers in the box. A trifecta box with three numbers has six possible permutations (for each of the three horses in the "box" that can finish first, there are two possibilities for which will finish second: 3 × 2) and costs six times the betting base amount. A trifecta box with five numbers has 60 possible permutations and costs 60 times the betting base amount (5 × 4 × 3). In France, a "box" gives only the ordered permutations going along an ordered list of numbers such that a trifecta box with six numbers would cost 20 times the base amount. For a single race, a wheel bet picks the winning horse, paired with any of the remaining horses in the field to finish second. For example, a wheel bet of "3-all" in a given race picks