I walked through Mainz today, and came upon this shop advertisement.....for self-protection gear.
Three years ago.....it wouldn't have been prominent or noticed in the middle of the street. Now, the guy knows that the public discusses this all the time now So, he's got the items listed and priced to sell.
I have no idea about the profits off this, but I'd take a wild guess that he sells at least ten to fifteen items a week. That's probably three times what he was doing in 2012.