Hacker News Reader

What if the non-profit is located outside of the US (and is considered a non-profit in its local jurisdiction)? Do they need to apply for a 501(c)(3), that is if they even can?

"proof of registration with the relevant country's regulatory bodies and authorities" also counts. You can read that HN discussion about donations in FOSS apps in my original comment, link [0].

Lol does that mean Ikea can sell on iOS without fees?

Same for Signal? They have a donate button in android app.

Signal is actually registered as a non-profit (which means accounting for where the money is going as well), so iOS version is perfectly fine to have "Donate to Signal" link opening in Safari.