Could be in any context. I do it a little on UFC fights but that’s a relatively low amount and I can afford I to lose any time I do. It seems like it’s becoming a really wide spread problem though, at least in the US. At the same time I don’t see why it should be illegal. Granted I also don’t think any drug should be illegal.
It’s all a scam as the house and all the intermediaries win, the client over time always loses, and somehow we keep doing it in the name of “fun”