If I may recommend a book to read, very insightful about Google, FB and others and why they “give away” so much and what they are reaping from it and where the data goes...
https://www.amazon.com/gp/product/B072NYKG2G/ref=ppx_yo_dt_b_d_asin_title_o01?ie=UTF8&psc=1
This is just a review link but in my opinion this is a seminal “must read” to open your eyes and mind as to where we are, and why they will fail. Data Aggregation and selling that info to others to build out their “personal portfolios” on each of us
I have my own copy and it is a treasure, as well as other books by the author George Gilder.
mark