This is a little bit "late". Fastmail has supported Bitcoin payment for a very long time. In fact, I was surprised last year when I wanted to try proton mail and they didn't have Bitcoin payments.
Everything they do is late, they got first to the market and stalled since then, the only improvement over the last years was that the UI transformed from being utter shit to a "passable" one.
ProtonMail has supported bitcoin for a long time too; I'm not sure why they're only announcing it now. I payed for my ProtonMail account at least 6 months ago with BTC...
I expect that's not the point he was trying to make. I believe he/she was stating their surprise that bitcoin was not a payment option back then. "Seriously."
The point was he wanted to test a service which does not ask him for his billing address, CC info and other stuff, which not only completely deanonymize him, he would also have to trust them to store this information safely (which you cannot really expect any company to do).
So in a way, his test was completed (no I don’t want to use this service) before he was even able to test their product.
Just imagine you want to test the food of the newly opened restaurant downstairs. Before you actually get to test the meal, have been treated like shit. Sure, you could have stayed to try the food, but you have already decided that it is not worth it.