alt Hacker NewsI lived in Australia for quite a while. It's a terrible example of what can happen. There was recently a very good BBC article on it and the connection between sports, gambling, and marketing: https://www.bbc.com/news/articles/cx2yg3k82y0o
Similar to many other toxic things, once the genie is out of the bottle and the government gets used to the revenue it generates, there is a large disincentive to tackling the problem.
For the government, it probably doesn't generate net revenue, because the government has to pick up a lot of the bill for gambling problems. Lobbying corruption, though, is another matter.