The behaviour of staff in any business is important. IMO more important in a sales environment. Let me illustrate with something from my past.
Back in the early 90s the hubby convinced me to get a Mac computer instead of another PC to replace my ancient Tandy 1000RL machine. There happened to be a pair of stores that carried Mac products in the town we lived in.
We started at the largest one thinking I might be able to put my hands on and try several macs in the store. It 20 30 minutes to be waited on so I wandered around the store looking at all the display models set up. If I even looked like I was going to touch one I got dirty looks from the staff. FInally someone came to talk to me. He never once listened to my requirements of what a machine should be able to do and what I wanted to use it for. In fact he would not talk to ME at all. He would only speak to my husband (this was in Texas not some country where it is inappropriate for women to speak). If I asked a question it went ignored until my husband asked it for me. I was livid.
We went to the other store and I spent about $4000 between the machine, monitor, accessories and software. I had to wait 2 weeks because the machine had to be ordered but who cared about that these people at the 2nd store answered every question, treated me with respect, and let me take as long as I wished to test drive the machines.
Now I know that story is not about
vaping but the upshot of it is the same. Bad service = lost sales and you never know when that lady in ratty jeans and tshirt isn't ready to drop a ton of cash.