What do additional requirements mean in the terms of a bonus promotion?

From what I understand, “additional requirements” usually means there may be conditions beyond simply claiming the promotion. For example, an upgrader.pro code like HELLAGOOD can add 5% to a deposit, but it still makes sense to check the current terms before funding the balance. Some platforms may set rules for bonus funds, eligible transactions, or specific features. Since Upgrader.pro includes case openings and upgrade rounds, I’d verify how the extra balance can be used and whether any restrictions apply.