This is crucial. How you play your coupons will depend on whether you lose the coupon when you win/lose/push and whether you can use it for 1:1 bets only or match any bet.
Keep in mind that the best 1:1 bet is craps, not blackjack. You only win 43% of the time in blackjack and lose 49% of the time; your small edge comes from the fact that you can double and split winning hands and surrender losing hands. At craps (pass line), you win 49% of the time and lose 51% of the time. So if you can use the match play to double a good hand, that's ideal; otherwise, go with craps (pass or don't pass).
I believe that, if allowed, match playing a single number bet at roulette is the best bet possible, because you essentially get paid 70:1 if you win.