My exact thought.

And perhaps this will force the eyes open of many companies that use that garbage to circulate private and delicate communications.

But how is Signal going to make enough money to support a massive user base?

Also, the article says

Cathcart responded that WhatApp will not have ads within the inbox or in the “messaging experience.”

So it seems they’re just going to be added to the extra features that most people don’t care about. Of course they could always change their mind, but that seems like a suicide move.