Are you a customer or a product?
If you are not paying for the service, you are not a customer You are the product.
(Whether this can always be said to be the case has not yet been examined.)
---
This page is auto-translated from /nishio/顧客なのか商品なのか using DeepL. If you looks something interesting but the auto-translated English is not good enough to understand it, feel free to let me know at @nishio_en. I'm very happy to spread my thought to non-Japanese readers.