I think Feng Shui is still used in China or at least the Chinese people, whether living in China or other countries. Those who learn the science of Feng Shui still use it for various purposes and there may also be those who use it for gambling.
Although Feng Shui is like a tool to make us confident, we should not rely too much on how we gamble on Feng Sui because if the result is different from what we get from Feng Shui, we will be disappointed.
Feng Shui is very popular as many companies follow it as a way to generate a more warm environment for their employees, however it is just a form of superstition and nothing more.
As I have never seen any study that shows that after an office space was ordered according to the guidelines of Feng Shui the productivity went up or the conflicts among the employees went down, to me this is just a way to cater to Chinese customers while at the same time the rest of the customers remain largely unaffected by those changes, so it is something with no downside for the casino.
Maybe we don't find it in big companies in developed countries because only a small percentage of those companies still use traditional methods and look outdated. But we have to know that they have great respect for that culture and still use it because they believe in all of it or our lives there are calculations that we cannot make sense of. And there may still be gamblers who use Fengshui to help them get what they want.