For people who can afford and willing to continue even that huge amount of implemented taxes there's no stopping them to partake with this activities.
It makes sense. Just like how people treat the increase of sin tax in tobacco, liquor, etc. They don't bother with the tax as long as they want to take part in it.
In other words, people know how to adjust and there will be a time that they are now used to experience an increased tax.
Gambling operators also know how to adjust if ever they will be imposed by the additional tax of the government. They will pass it to their customers in a way that is not noticeable or proposed a win-win situation for both parties.