alt Hacker NewsThe tangent explicitly talks about generic messaging services. Whatsapp and Signal have more money than gpg. Thinking about it more, it is not even a tangent, because TFA says:
"Use Signal. Or Wire, or WhatsApp, or some other Signal-protocol-based secure messenger."
I wrote TFA. Signal is a nonprofit. The article says to use Signal-protocol-based messengers, of which there are several. Your objection about money doesn't make sense.