[jokethrowaway]

It's absolutely morally clean. The people losing money made their choice.

Similarly I don't see anything wrong working for a betting company or even a company that produce dangerous or addictive drugs.

I consider it morally wrong to work for the government or for criminal organisations which steal money under the threat of violence or kill people for reasons other than self defence.

[MattPalmer1086]

Personally I find it immoral to support things that I believe cause more harm than good, regardless of whether the participants were compelled to do so by violence.