There is huge competition between casinos in my country so their use every opportunity to market their platform. They sponsor different TV programs during which their advertisements are shown regularly.
It is true that TV ads will give them a wider coverage, but at the same time the costs of TV ads are very high and this can have a substantial effect on the finances of a company, take a look at what happened with tobacco, during the 80’s there was a strong campaign to ban ads all over the world, and while tobacco companies thought this will be the end of them, in fact their revenue increased as now they did not had to spend a fortune on those ads, so it is possible such a ban could be a silver lining instead.
The cost of TV ads is the least problem for casinos because they are big and can afford to run their advertisement in any media in the globe. Advertisement is part of their marketing that they budget for in theur financial plannings.