I am surprised the person was surprised. I was using a lot of coffee shop WiFi in 2010's and earlier, and random injection was fairly common. Sometimes generic

I am surprised the person was surprised. I was using a lot of coffee shop WiFi in 2010's and earlier, and random injection was fairly common. Sometimes generic ads, sometimes timers ("You get free wifi for 1 hour, you have 42 minutes remaining"), sometimes ads for the coffee shop itself.