I read this as a phone contract having a bundled: unlimited whatsapp, Spotify, Facebook bundles where data usage is not counted towards your total data allowance in the contract. For example in my country in the middle of Europe you have bundles with unlimited traditional communication and 20 50 80GB of mobile data.

When you WhatsApp all day sending videos, gifs, messages, voice messages, pictures, documents..I can consume up to 12GB per month, this costing me an amount of my 20GB data plan. While a other provider I can choose has a 20GB data plan with a unlimited WhatsApp bundle. Sadly they don’t offer eSIM and 5G so it’s a no go for me.