It stands to reason that if one has the money to burn, shops will keep the doors open to cheer that person on. But when I stood here to reason at the sight of this big billboard, what sprang to mind was an ad in February about the Mainlanders' "invasion" into Hong Kong. The ad was reported in some international media like here*.
Hong Kong people are feeling irritated by the situation not for no reasons. And this has as well something to do with the Mainlanders' money burning in so fierce a way that the sight of shops selling luxury brands is running the full length of almost every streets in major shopping areas. In shopping malls, the existence of other shops is turning fewer and farther between. Just last night I went to a previously quieter shopping centre and hoped to do window-shopping at an old used-camera store. But the shop and, in fact, the whole array of neighbouring shops have become a run of pharmacies. Why? The Mainlanders come to Hong Kong for milk powders and Chinese tunics! I don't have to mention how trustworthy the food items in Mainland China are. Their sort of "scare buying" has left Hong Kong a constant shortage of milk powders and many new parents in chagrin.
It stands to reason that when these happen, the locals are asking to fight them back, which is a deplorable development.
* In Chinese, or at least Cantonese, locust can be used as a derogative euphemism for people who do harm and no good. The mountain atop which the locust perches in the ad is called the Lion's Rock which, after the broadcast of a popular sitcom "Under the Lion's Rock" in the 1970s, epitomises the can-do spirits of Hongkongers.