“You can’t activate the warranty without it” That’s illegal in most of the world

That’s not even what it is lol.

And as the other commenter alluded to, defaults matter. You’re not replacing the thing everyone is already using by pitching “here’s an alternative that is better in ways which don’t affect your usage at all, and also you have to dig into the settings to turn off the optional daily popups”

I like Signal. I even got all my close friends and family on it, specifically to message me because I won’t use whatsapp. The PIN reminders are annoying it enough to be legitimately holding it back from mass appeal imho