Customers hit device limits. Then they get angry. An IPTV Reseller Panel that warns customers before they hit the limit prevents anger. "You have 1 device slot remaining. Remove an old device to add a new one." British IPTV customers appreciate foresight. What actually works is enabling all limit warnings your panel offers. Most operators leave warnings off. Their customers hit walls unexpectedly.
That said, British IPTV resellers with the fewest device limit complaints all use proactive warnings. Your IPTV Reseller Panel might have notification settings. Turn them on. I've watched resellers add a simple line to their welcome message: "You can register 3 devices. Need more? Reply here." Customers read it. They remember. They don't get surprised. Honestly, test your device limit experience right now. Add devices until you hit the limit. What does the customer see? A helpful message? Or a generic error? If it's generic, improve it. Add explanation to your FAQ. Better yet, message customers before they hit limits. Surprise is the enemy of satisfaction. Eliminate it.