[bittermang]

The chat networks do.

As well as several of the methods outlined for protecting/locating the dead drops. WiFi hotspots, bluetooth beacons, etc.

[yyx]

You'd love to know that Telegram works on PC too.

[wbl]

What is the going price for a Telegram 0-day again?

[brohee]

Up to $500,000 for RCE+LPE (https://www.zerodium.com/program.html)