This message is from some company about coming into your house and doing a presentation about air purification and giving you a no obligation $10 Tim Horton gift card. My husband answered and gave a big speel. Sounds like a scam to me.
Most of the time, these are super-aggressive direct sales people who sell super-overpriced products who may or may not be running a scam. Many of these products are available for much $less at your local home improvement store. Best to keep them out of your home.
Tactics changed. Now you get a scratch card in the mail. "Treasure Hunt" $10,000 prize.. . .and every card wins. Go figure! In the fine print - "You may be asked to view a FilterQueen indoor air quality system demonstration". Oh! your prize? Why, to be entered in a draw. Odds of winning? - 21 out of 1,000,000.
Telemarketer who solicits business calls for salespersons to come to home to sell air cleaners. Promised a $10.00 gift card for Tim Hortons. Good luck.