EV charging doesn’t require you to stand around for 5 minutes holding a handle to fuel up. The charging times are longer, but once plugged in your need to stay anywhere near the vehicle is zero. And plugging in usually takes less than 5s.
So even if someone came up with a system whereby they expected you to watch an ad before the power would flow, you could always just plug in and walk away. How are they going to know you’re physically there?
As an EV driver I haven’t been to a gas station since I started driving it, but AFAIK this advertising hasn’t come to Canada — and hopefully it never does.