Because:
> If you are not paying for it, you’re not the customer; you’re the product being sold. -- Andrew Lewis
replies(3):
> If you are not paying for it, you’re not the customer; you’re the product being sold. -- Andrew Lewis
Also, plently of people at Google, Meta, etc feel they are doing good by providing free ads based services.
I suspect people with low income are way better off with free search, free maps, free docs than if each was $3 a month. It doesn't sound like much but their were definitely times in my life where $3 a month per service felt like too much. And yet, those services arguably provide extraordinary value for their users.