Above, I've seen this kind of betting compared to bonus buys. Namely, by the ever so positive @Flatzem888. The thing is, though, that on slots, you have the odds firmly stacked against you. I mean, you are playing under the terms that for every 100 you invest, you will lose a portion of it, be it a 96, 94, 92, or whatever return. In sports betting, however, the conditions change. It is VERY possible to find an advantageous condition, or in other words: a value bet. This means, if you have the experience to spot the value, you are in the winning position. This can never be true for slots.