[Yizahi]

Do you use your smartphone? Or dumbphone? Do you use credit cards (including debit cards and every other way of electronic payments)? Do you use browser? Even loaded with anti-spying plugins?

If any of the answers is yes then you are being watched and profiled. And of course those companies you actively avoid would simply buy raw data or "analytics" from the companies you still use.

[jamaicahest]

There is a big difference in letting these companies control your mental well being, as in the letter, and letting them know intimate details about you. The first is well within your control:. don't use Facebook/Instagram/etc., then their algorithms will not affect your mood, because you won't interact with them at all.