Below article says, we will have to pay 50 euros to use for unlimited use of Wordpress plugin. Can you tell me what's the limitation and what's this price is about? Is it top of the price we are already paying?

Unlimited subscription: For just 50 euros a year, enjoy unlimited use of the plugin. You can integrate WhatsApp across multiple sites and offer unlimited support to clients at no additional cost.

https://tochat.be/click-to-chat/2024/10/11/introducing-our-new-whatsapp-plugin-for-wordpress/