No. When you use the Social Trader Tools White Label platform, your clients do not need to purchase a separate Social Trader Tools subscription.
As the White Label owner, you pay for the account hosting used by your platform. You decide how to structure your own pricing, whether that's free access, a monthly subscription, a performance fee, or another pricing model.
This allows you to offer a seamless, fully branded experience where your clients interact with your business rather than Social Trader Tools.