Per message, not per campaign. Each RCS message delivered to an RCS-capable handset is billed at the rate for its category. There is no setup fee to start with SMSGatewayHub; you buy Pay As You Go credits and track RCS and fallback spend in one wallet.
Basic versus rich content. A plain text RCS message from your verified agent is the lightest send. Rich cards with images, carousels and suggested-reply buttons use more bandwidth and are normally sent as promotional messages, so they sit in the higher tier. Keeping transactional templates simple keeps them in the lower tier.
SMS fallback. Not every phone supports RCS. When a handset or network cannot receive it, the message falls back to SMS automatically. The fallback is billed as an SMS, at your SMS rate, and only when the SMS is delivered, so you never pay an RCS rate for a non-RCS delivery.
GST. All rates are exclusive of GST, which is added to your invoice.