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.
I disagree, advertising is probably the highest expense casinos incur, however they cannot afford to not advertise because if they do not and their competitors do then they will soon find themselves out of business, however if a ban is put in place by the government instead, this will put all casinos on equal ground and allow them to not spend that much promoting themselves, which ironically it could boost their profits in a very significant way.