Re:Germany bans Facebook from handling WhatsApp data over pr...
by jp555 on Wednesday May 12, 2021 @04:28PM
(#27134763)
I might gave this wrong, but only the users saw their own data in the ads they were served. Signal can choose lots of parameters for who should see their ads, but they dont get to see who those people are.
https://www.androidauthority.com/signal-ads-banned-facebook-...
That article showcases what Signal was trying to show Facebook's users.
The data accumulated cannot be purchased, but the power of that harvested data certainly can be.