There is a chinese saying: "趁火打劫" (profiteering during emergencies), and you greedy scums are doing just that. What you are doing is not a 'business' but an unscrupulous de-service to the public during this haze period.
As for those nice people giving out free masks at public places, or any companies/retailers that are still continuing selling at original prices, WE SALUTE YOU. Thank you for your honest and good practises.
Adapted from EDMW loves Singapore