obviously it's not going to be free, I was more curious what made it specifically 'more difficult than video'. I'd hope there would be some opportunity for cac

obviously it's not going to be free, I was more curious what made it specifically 'more difficult than video'. I'd hope there would be some opportunity for caching to make it a bit cheaper than every single request, but maybe with dynamic targeted or real-time ad bidding that wouldn't work so well.