It's important to be careful in these discussions of the exact kind of coupon in play. For your described "free bet", do they take the coupon away after any decision win or lose? The Grosjean article goes into a ton of detail about these.
If they do remove the coupon after any decision, Sonny's advice at straight up numbers on roulette is the best. If you must use it on an even money bet, consult Grosjean on how to use it for the back bet at 3-card poker. If you can't do that, baccarat is a reasonable choice but contrary to other advice given, tie is the best bet (if allowed), then PLAYER, then banker. That's right, the best coupon bet at baccarat is normally the worst bet. Coupons turn the whole process on its head.
If the $75 free bet can continue to be played until it is lost, ignore everything I just said and treat it essentially like cash.
If they do remove the coupon after any decision, Sonny's advice at straight up numbers on roulette is the best. If you must use it on an even money bet, consult Grosjean on how to use it for the back bet at 3-card poker. If you can't do that, baccarat is a reasonable choice but contrary to other advice given, tie is the best bet (if allowed), then PLAYER, then banker. That's right, the best coupon bet at baccarat is normally the worst bet. Coupons turn the whole process on its head.
If the $75 free bet can continue to be played until it is lost, ignore everything I just said and treat it essentially like cash.