>>pera+(OP)
One has to wonder about behind the scenes heuristics as it pertains to taking a chance distributing a backdoored version sideloaded into the App Stores. One also wonders about whether the encryption or app are possibly compromised generally (even if the source is vetted and distributions are verified)
Perhaps most of interest though would be how many phones are owned otherwise, to give access to the protester Signal comms anyway
And also metadata must still fly around anyway, no?