If we look at the population of Macau, it is unlikely that the casino industry will increase if it does not welcome and even facilitate players from other countries, especially China who may contribute the most players. China in this respect seems somewhat protective of their own people where violators (of the population) also don't get any legal consequences, given that it is clear that online betting is illegal.
Chinese law is strange and the country is home to a huge population. As ForeignPolicy.com put it, China is a place “where no vice is legal, but every vice is tolerated.” ~source