It asks to verify pin once a month. Which I think is fair, since it can help you recover from a lockout / transfer your device.

Even that is too annoying. OK, I just realized there's a way to turn off reminders. Trust me bro, I'm not gonna forget. I'm a big boy.

backups are important, but they can also be disabled

Ah! YES! Thanks! I just poked around deeper in the settings and disabled them. Backups are not important to me. I don't want to backup my messages.

I have never been asked to verify my recovery key.

Maybe it's because I had backups on? Let's see if this popup goes away.

Donating to open source projects is important, as it’s a large portion of their funding.

Agreed. Which is why I donate to them.... And I still get the popups! I'm already a donor, leave me alone.

Overall, I want to give my attention to my messages, not to Signal. Leave me alone. Let me message people. I don't want to be nagged. WhatsApp doesn't nag people nearly as much. I know Signal is overall better, but user annoyances like the excessive popups makes it harder for me to try to convince normal people to use Signal.