This is one of the most 'evil' policies I've simply ever heard of. I know today it's not even allowed to mention it, but it seems like the most slam dunk monopoly abuse possible. The damage to customers is clear, a company could charge 15% less and receive the same amount if they were simply 'allowed' to tell customers to go to their site. Somehow Fortnite did exactly this, got banned for it, and it still wasn't enough to put an end to it.