Yes this is truly annoying part of modern tech. They used to say if you don't pay for it, you are the product. Now even if you pay for it you are still the product because they can do whatever they want with your data anyway.

It happens, because financial figure optimizer role people see some potential that it could works and try to squeeze every last penny out of it, even celebrate themselves for it, and we, by and large, let them get away with it, instead of giving them the middle finger.

The 10$ are for 1TB of OneDrive, Word and Excel are just free extras.