In the case of WhatsApp they charge businesses for business features. https://support.zendesk.com/hc/en-us/articles/4408818454938-WhatsApp-pricing-change-annou

In the case of WhatsApp they charge businesses for business features. https://support.zendesk.com/hc/en-us/articles/4408818454938-WhatsApp-pricing-change-announcement https://support.zendesk.com/hc/en-us/articles/4408818454938-... Prior to business features a long time ago they used to charge a one time $1 fee to download then $1 per year.