Why does Signal want a phone number to register if it's supposedly privacy first?
Because they're building a private, not anonymous, instant messenger. They've been very open about this.
gosha.net Gosha Tcherednitchenko
Photography, design, writing, and software projects by Gosha Tcherednitchenko
www.quartey.com Emmanuel Quartey
Turning over cool-looking rocks and writing down what I find. I love you.
Tracey Jaquith 
poohbot.com chez Tracey Jaquith
Tracey Jaquith / traceypooh website & blog. Tech, Cycling, Video, DevOps, JS & more. Live nonstop.
cometpustoj.neocities.org Comet Pustój
As I fly by your nebula, I write space poetry and send zines to earth.