Closed source that pretends to be your friend. They are just wearing a different mask than google, microsoft, facebook, bytedance, and so on. Any privacy gained is a circumstantial side-effect that will cede to any monetary interests and will be used as an excuse to lock users into their walled garden.
Pornstars show us their assholes but I’m pretty sure they don’t want everybody to know where they live. Just like normal people aren’t comfortable shitting in a public toilet with the door open.