Do you really think Microsoft and Apple don't sell "you" too?

They have (admittedly less-successful) advertising businesses that they show no signs of abandoning, they boast about the number of accounts and/or the number of credit cards they have for developers and partners and so on.

To a first approximation "everybody" wants your money and "everybody" sells you. Generalizations don't work. You need to look at the bundles that come with products/ecosystems on a case-by-case basis.

Google isn't selling me. They're selling a service based on information they get from me in exchange for a product they make for me. It's just another form of payment. Every form of payment comes with it's own benefits and drawbacks.

(I didn't downvote you by the way. I never downvote)

Except it's not as simple as "don't use GMail and you're safe" - they have their finger in every pie via their ad system. You can very, very easily opt-out of using MS or Apple products.