The mall stores are generally small and have lots of inventory that is cheap to make, high quality, and almost never spoils. They don't need a big staff, there's no real problem with theft, and everything is extremely high margin.
Even if nobody bought anything from the stores, they do go in and smell a few candles once in a while, so when they sell through other channels - fund raisers, an end cap in another retail store, catalogs - people know their brand and their products well enough to make an impulse buy.
Plus they were the first to really explode in the industry. They started as a single store in an old wooden building in my home town and everyone wondered why people would buy fancy candies. But they had classes where kids could make their own candles with unscented wax and a wick and parents loved that.
Fast forward 20 or 30 years and they have an enormous retail store, with a model train room where it's always snowing and you can buy elaborate train sets, a toy store, every candle in their inventory and a bunch of home goods, decent food and random entertainment including an animatronic oompapa band with my late great uncle's likeness preserved for decades. They've had Santa come in on a helicopter, cops have to manage traffic and the parking lot is full year round. At one point, the owner even built a huge car museum next door to show off his personal collection. It's a huge small town success story from a rural farming town in Massachusetts.